diff --git a/LICENSE.txt b/LICENSE.txt
index 467e2a2..a9e57a9 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -21,4 +21,4 @@ FatFs has being developped as a personal project of the author, ChaN. It is free
 / by use of this software.
 /----------------------------------------------------------------------------*/
 
-Therefore FatFs license is one of the BSD-style licenses but there is a significant feature. FatFs is mainly intended for embedded systems. In order to extend the usability for commercial products, the redistributions of FatFs in binary form, such as embedded code, binary library and any forms without source code, does not need to include about FatFs in the documentations. This is equivalent to the 1-clause BSD license. Of course FatFs is compatible with the most of open source software licenses including GNU GPL. When you redistribute the FatFs source code with any changes or create a fork, the license can also be changed to GNU GPL, BSD-style license or any open source software license that not conflict with FatFs license.
+Therefore FatFs license is one of the BSD-style licenses, but there is a significant feature. FatFs is mainly intended for embedded systems. In order to extend the usability for commercial products, the redistributions of FatFs in binary form, such as embedded code, binary library and any forms without source code, do not need to include about FatFs in the documentations. This is equivalent to the 1-clause BSD license. Of course FatFs is compatible with the most of open source software licenses include GNU GPL. When you redistribute the FatFs source code with changes or create a fork, the license can also be changed to GNU GPL, BSD-style license or any open source software license that not conflict with FatFs license.
diff --git a/documents/00index_e.html b/documents/00index_e.html
index 743f5d2..e1df788 100644
--- a/documents/00index_e.html
+++ b/documents/00index_e.html
@@ -22,8 +22,8 @@
 <h4>Features</h4>
 <ul>
  <li>DOS/Windows compatible FAT/exFAT filesystem.</li>
- <li>Platform independent. Easy to port.</li>
- <li>Very small footprint for program code and work area.</li>
+ <li>Platform independent. <a href="doc/appnote.html#port">Easy to port</a>.</li>
+ <li>Very small <a href="doc/appnote.html#memory">footprint</a> for program code and work area.</li>
  <li>Various <a href="doc/config.html">configuration options</a> to support for:
   <ul>
    <li>Long file name in ANSI/OEM or Unicode.</li>
@@ -105,9 +105,9 @@
 <div class="para">
 <h3>Media Access Interface</h3>
 <img src="res/layers2.png" class="rset" width="245" height="220" alt="layer">
-<p>Since FatFs module is the <em>filesystem layer</em> independent of platforms and storage media, it is completely separated from the physical devices, such as memory card, harddisk and any type of storage device. The low level device control module is <em>not any part of FatFs module</em> and it needs to be provided by implementer. FatFs accesses the storage devices via a simple media access interface shown below. Also sample implementations for some platforms are available in the downloads. A function checker for low level disk I/O module is available <a href="res/app4.c">here</a>.</p>
+<p>Since FatFs module is the <em>filesystem layer</em> independent of platforms and storage media, it is completely separated from the physical devices, such as memory card, harddisk and any type of storage device. The storage device control module is <em>not any part of FatFs module</em> and it needs to be provided by implementer. FatFs controls the storage devices via a simple media access interface shown below. Also sample implementations for some platforms are available in the downloads. A function checker for storage device control module is available <a href="res/app4.c">here</a>.</p>
 <ul>
- <li>Disk Controls
+ <li>Storage Device Controls
  <ul>
   <li><a href="doc/dstat.html">disk_status</a> - Get device status</li>
   <li><a href="doc/dinit.html">disk_initialize</a> - Initialize device</li>
@@ -127,11 +127,11 @@
 
 <div class="para">
 <h3>Resources</h3>
-<p>The FatFs module is a free software opened for education, research and development. You can use, modify and/or redistribute it for personal projects or commercial products without any restriction under your responsibility. For further information, refer to the application note.</p>
+<p>The FatFs module is a free software opened for education, research and development. You can use, modify and/or redistribute it for any purpose without any restriction under your responsibility. For further information, refer to the application note.</p>
 <ul>
  <li><em>Read First: <a href="doc/appnote.html">FatFs module application note</a></em></li>
- <li>Download: <a href="http://elm-chan.org/fsw/ff/archives.html">Archives</a></li>
- <li>Community: <a href="http://elm-chan.org/fsw/ff/bd/">FatFs User Forum</a></li>
+ <li>Downloads: <a href="http://elm-chan.org/fsw/ff/archives.html">Previous Releases</a>↗ </li>
+ <li>Community: <a href="http://elm-chan.org/fsw/ff/bd/">FatFs User Forum</a>↗ </li>
  <li><a href="https://msdn.microsoft.com/en-us/windows/hardware/gg463080.aspx">FAT32 Specification by Microsoft</a>↗ (The authorized document on FAT filesystem)</li>
  <li><a href="http://elm-chan.org/docs/fat_e.html">The basics of FAT filesystem</a></li>
  <li><a href="http://elm-chan.org/docs/exfat_e.html">The basics of exFAT filesystem</a></li>
@@ -143,5 +143,6 @@
  <li><a href="res/rwtest2.png">Benchmark 2</a> (LPC2368/72MHz with MMC via MCI)</li>
 </div>
 
+
 </body>
 </html>
diff --git a/documents/doc/appnote.html b/documents/doc/appnote.html
index 69d8c02..f8ccbbf 100644
--- a/documents/doc/appnote.html
+++ b/documents/doc/appnote.html
@@ -25,7 +25,7 @@
 <li><a href="#fs1">Performance Effective File Access</a></li>
 <li><a href="#fs2">Considerations on Flash Memory Media</a></li>
 <li><a href="#critical">Critical Section</a></li>
-<li><a href="#fs3">Extended Use of FatFs API</a></li>
+<li><a href="#fs3">Various Usable Functions for FatFs Projects</a></li>
 <li><a href="#license">About FatFs License</a></li>
 </ol>
 
@@ -54,7 +54,7 @@ The FatFs module is a middleware written in ANSI C (C89). There is no platform d
 <dt><tt>DWORD</tt></dt><dd>32-bit unsigned integer in range of 0 to 2<sup>32</sup> - 1.</dd>
 <dt><tt>QWORD</tt></dt><dd>64-bit unsigned integer in range of 0 to 2<sup>64</sup> - 1.</dd>
 <dt><tt>UINT</tt></dt><dd>Alias of <tt>unsigned int</tt> used to specify any number.</dd>
-<dt><tt>WCHAR</tt></dt><dd>Alias of <tt>WORD</tt> used to specify a UTF-16 encoding unit.</dd>
+<dt><tt>WCHAR</tt></dt><dd>Alias of <tt>WORD</tt> used to specify a UTF-16 code unit.</dd>
 <dt><tt>TCHAR</tt></dt><dd>Alias of <tt>char</tt>, <tt>WCHAR</tt> or <tt>DWORD</tt> used to specify a character encoding unit.</dd>
 <dt><tt>FSIZE_t</tt></dt><dd>Alias of <tt>DWORD</tt> or <tt>QWORD</tt> used to address file offset and to specify file size.</dd>
 <dt><tt>LBA_t</tt></dt><dd>Alias of <tt>DWORD</tt> or <tt>QWORD</tt> used to address sectors in LBA and to specify number of sectors.</dd>
@@ -67,7 +67,7 @@ The FatFs module is a middleware written in ANSI C (C89). There is no platform d
 <p><img src="../res/funcs.png" width="750" height="420" alt="functional diagram"></p>
 
 <h4>Required Functions</h4>
-<p>You need to provide only storage device control functions required by FatFs module and nothing else. If a working disk I/O module for the target system is already provided, you need to write only glue functions to attach it to the FatFs module. If not, you need to port another disk I/O module or write it from scratch. Most of defined functions are not that always required. For instance, any write function is not required at read-only configuration. Following table shows which function is required depends on the configuration options.</p>
+<p>You need to provide only MAI functions required by FatFs module and nothing else. If any working device control module for the target system is available, you need to write only glue functions to attach it to the FatFs module. If not, you need to port another device control module or write it from scratch. Most of MAI functions are not that always required. For instance, any write function is not required in read-only configuration. Following table shows which function is required depends on the configuration options.</p>
 <table class="lst2">
 <tr><th>Function</th><th>Required when</th><th>Note</th></tr>
 <tr><td>disk_status<br>disk_initialize<br>disk_read</td><td>Always</td><td rowspan="5">Disk I/O functions.<br>Samples available in ffsample.zip.<br>There are many implementations on the web.</td></tr>
@@ -103,17 +103,17 @@ The FatFs module is a middleware written in ANSI C (C89). There is no platform d
 <tr><th></th><th>ARM7<small><br>32bit</small></th><th>ARM7<small><br>Thumb</small></th><th>CM3<small><br>Thumb-2</small></th><th>AVR</th><th>H8/300H</th><th>PIC24</th><th>RL78</th><th>V850ES</th><th>SH-2A</th><th>RX600</th><th>IA-32</th></tr>
 <tr class="cal">     <td>Compiler</td><td>GCC</td><td>GCC</td><td>GCC</td><td>GCC</td><td>CH38</td><td>C30</td><td>CC78K0R</td><td>CA850</td><td>SHC</td><td>RXC</td><td>MSC</td></tr>
 <!--                                                      ARM        Thumb          CM3           AVR            H8          PIC24          RL78       V850ES        SH-2A        RX600        IA-32   -->
-<tr class="ral"><td class="cal">text (Full, R/W)</td><td>10.4k</td><td>6.7k</td><td>6.3k</td><td>12.4k</td> <td>9.9k</td><td>11.2k</td><td>13.0k</td><td>8.7k</td><td>9.0k</td><td>6.5k</td><td>8.9k</td></tr>
-<tr class="ral"><td class="cal">text (Min, R/W)</td>  <td>7.0k</td><td>4.7k</td><td>4.4k</td> <td>8.4k</td> <td>6.9k</td> <td>7.8k</td> <td>9.4k</td><td>6.0k</td><td>6.2k</td><td>4.6k</td><td>6.3k</td></tr>
-<tr class="ral"><td class="cal">text (Full, R/O)</td> <td>4.8k</td><td>3.1k</td><td>2.8k</td> <td>5.7k</td> <td>4.7k</td> <td>5.3k</td> <td>6.4k</td><td>4.2k</td><td>4.0k</td><td>3.1k</td><td>4.2k</td></tr>
-<tr class="ral"><td class="cal">text (Min, R/O)</td>  <td>3.6k</td><td>2.4k</td><td>2.2k</td> <td>4.4k</td> <td>3.6k</td> <td>4.1k</td> <td>5.0k</td><td>3.3k</td><td>3.1k</td><td>2.4k</td><td>3.3k</td></tr>
+<tr class="ral"><td class="cal">text (Full, R/W)</td><td>10.6k</td><td>6.8k</td><td>6.4k</td><td>12.4k</td><td>10.1k</td><td>11.4k</td><td>13.1k</td><td>8.9k</td><td>9.1k</td><td>6.5k</td><td>9.0k</td></tr>
+<tr class="ral"><td class="cal">text (Min, R/W)</td>  <td>7.2k</td><td>4.8k</td><td>4.6k</td> <td>8.5k</td> <td>7.1k</td> <td>8.0k</td> <td>9.6k</td><td>6.3k</td><td>6.3k</td><td>4.7k</td><td>6.4k</td></tr>
+<tr class="ral"><td class="cal">text (Full, R/O)</td> <td>5.0k</td><td>3.2k</td><td>2.9k</td> <td>6.0k</td> <td>4.8k</td> <td>5.5k</td> <td>6.6k</td><td>4.4k</td><td>4.1k</td><td>3.2k</td><td>4.3k</td></tr>
+<tr class="ral"><td class="cal">text (Min, R/O)</td>  <td>3.8k</td><td>2.5k</td><td>2.3k</td> <td>4.4k</td> <td>3.8k</td> <td>4.2k</td> <td>5.2k</td><td>3.4k</td><td>3.3k</td><td>2.5k</td><td>3.5k</td></tr>
 <tr class="ral"><td class="cal">bss</td><td>V*4 + 2</td><td>V*4 + 2</td><td>V*4 + 2</td><td>V*2 + 2</td><td>V*4 + 2</td><td>V*2 + 2</td><td>V*2 + 2</td><td>V*4 + 2</td><td>V*4 + 2</td><td>V*4 + 2</td><td>V*4 + 2</td></tr>
 <tr class="ral"><td class="cal">Work area<br><small>(FF_FS_TINY == 0)</small></td><td>V*564<br>+ F*552</td><td>V*564<br>+ F*552</td><td>V*564<br>+ F*552</td><td>V*560<br>+ F*546</td><td>V*560<br>+ F*546</td><td>V*560<br>+ F*546</td><td>V*560<br>+ F*546</td><td>V*564<br>+ F*552</td><td>V*564<br>+ F*552</td><td>V*564<br>+ F*552</td><td>V*564<br>+ F*552</td></tr>
 <tr class="ral"><td class="cal">Work area<br><small>(FF_FS_TINY == 1)</small></td><td>V*564<br>+ F*40</td><td>V*564<br>+ F*40</td><td>V*564<br>+ F*40</td><td>V*560<br>+ F*34</td><td>V*560<br>+ F*34</td><td>V*560<br>+ F*34</td><td>V*560<br>+ F*34</td><td>V*564<br>+ F*40</td><td>V*564<br>+ F*40</td><td>V*564<br>+ F*40</td><td>V*564<br>+ F*40</td></tr>
 </table>
 <p>These are the memory usage of FatFs module without lower layer on some target systems in following condition. <em>V</em> denotes number of mounted volumes and <em>F</em> denotes number of open files. Every samples here are optimezed in code size.</p>
 <pre>
-FatFs R0.13a options:
+FatFs R0.14a options:
 FF_FS_READONLY   0 (Read/Write) or 1 (Read only)
 FF_FS_MINIMIZE   0 (Full, with all basic functions) or 3 (Min, with fully minimized)
 FF_FS_TINY       0 (Default) or 1 (Tiny file object)
@@ -180,12 +180,12 @@ And any other options are left unchanged from original setting.
 </table>
 <p>When the LFN is enabled, the module size will be increased depends on the configured code page. Right table shows the increment of code size in some code pages. Especially, in the CJK region, tens of thousands of characters are being used. Unfortunately, it requires a huge OEM-Unicode bidirectional conversion table and the module size will be drastically increased as shown in the table.</p>
 <p>As the result, the FatFs with LFN enabled with DBCS code pages will not able to be ported on the most 8-bit MCU systems. If the target system is in legacy-free, in only Unicode and any ANSI/OEM code is not used at all, the code page setting gets meaningless. You will able to reduce the code size by configureing FatFs for Unicode with any SBCS code page.</p>
-<p>There ware some restrictions on using LFN for open source project because the LFN extension on the FAT filesystem was a patent of Microsoft Corporation. But the related patents all have expired and using the LFN feature has got free for any projects.</p>
+<p>There ware some restrictions on using LFN for open source project, because the LFN extension on the FAT filesystem was a patent of Microsoft Corporation. However the related patents all have expired and using the LFN feature is free for any projects.</p>
 </div>
 
 <div class="para doc" id="unicode">
 <h3>Unicode API</h3>
-<p>By default, FatFs uses ANSI/OEM code set on the API even at LFN configuration. FatFs can also switch the character encoding on the API to Unicode by configuration option <tt><a href="config.html#lfn_unicode">FF_LFN_UNICODE</a></tt>. This means that FatFs is compliant with the full featured LFN specification. The data type <tt>TCHAR</tt> specifies path name strings on the API is an alias of either <tt>char</tt>(ANSI/OEM or UTF-8), <tt>WCHAR</tt>(UTF-16) or <tt>DWORD</tt>(UTF-32) depends on that option. For more information, refer to the description in the <a href="filename.html#uni">file name</a>.</p>
+<p>By default, FatFs uses ANSI/OEM code set on the API even in LFN configuration. FatFs can also switch the character encoding on the API to Unicode by configuration option <tt><a href="config.html#lfn_unicode">FF_LFN_UNICODE</a></tt>. This means that FatFs is compliant with the full featured LFN specification. The data type <tt>TCHAR</tt> specifies path name strings on the API is an alias of either <tt>char</tt>(ANSI/OEM or UTF-8), <tt>WCHAR</tt>(UTF-16) or <tt>DWORD</tt>(UTF-32) depends on that option. For more information, refer to the description in the <a href="filename.html#uni">file name</a>.</p>
 <p>Note that setting of code page, <tt><a href="config.html#code_page">FF_CODE_PAGE</a></tt>, has actually no meaning when FatFs is configured for the Unicode API. It should be set 437 anyway. However it still affects code conversion of string I/O functions at <tt><a href="config.html#strf_encode">FF_STRF_ENCODE</a> == 0</tt> and backward compatibility with legacy systems, so that code page may need to be configured properly if it is considered a problem.</p>
 </div>
 
@@ -288,17 +288,18 @@ Figure 5. Minimized critical section<br>
 </div>
 
 <div class="para doc" id="fs3">
-<h3>Extended Use of FatFs API</h3>
+<h3>Various Usable Functions for FatFs Projects</h3>
 <p>These are examples of extended use of FatFs APIs. New item will be added when useful code example is found.</p>
 <ol>
-<li><a href="http://elm-chan.org/fsw/ff/res/app1.c">Open or create a file for append</a> (for R0.12 and earlier)</li>
-<li><a href="http://elm-chan.org/fsw/ff/res/app2.c">Delete a non-empty sub-directory</a> (for R0.12 and later)</li>
-<li><a href="http://elm-chan.org/fsw/ff/res/app3.c">Allocate contiguous area to the file</a> (for R0.11a and earlier)</li>
-<li><a href="http://elm-chan.org/fsw/ff/res/app5.c">Test if the file is contiguous or not</a></li>
-<li><a href="http://elm-chan.org/fsw/ff/res/app4.c">Compatibility checker for storage device control module</a></li>
-<li><a href="http://elm-chan.org/fsw/ff/res/app6.c">Performance checker for storage device control module</a></li>
-<li><a href="http://elm-chan.org/fsw/ff/res/mkfatimg.zip">FAT volume image creator</a></li>
-<li>Virtual drive feature (refer to lpc176x/ in <a href="../ffsample.zip">ffsample.zip</a>)</li>
+<li><a href="http://elm-chan.org/fsw/ff/res/app1.c">Open or Create File for Append</a> (superseded by FA_APPEND flag added in R0.12)</li>
+<li><a href="http://elm-chan.org/fsw/ff/res/app2.c">Delete Non-empty Sub-directory</a> (for R0.12 and later)</li>
+<li><a href="http://elm-chan.org/fsw/ff/res/app3.c">Create Contiguous File</a> (superseded by f_expand function added in R0.12)</li>
+<li><a href="http://elm-chan.org/fsw/ff/res/app5.c">Test if the File is Contiguous or Not</a></li>
+<li><a href="http://elm-chan.org/fsw/ff/res/app4.c">Compatibility Checker for Storage Device Control Module</a></li>
+<li><a href="http://elm-chan.org/fsw/ff/res/app6.c">Performance Checker for Storage Device Control Module</a></li>
+<li><a href="http://elm-chan.org/fsw/ff/res/mkfatimg.zip">FAT Volume Image Creator</a> (Pre-creating built-in FAT volume)</li>
+<li>Virtual Drive Feature (refer to lpc176x/ in <a href="../ffsample.zip">ffsample.zip</a>)</li>
+<li><a href="http://elm-chan.org/fsw/ff/res/uniconv.zip">Embedded Unicode String Utilities</a> (OEMxxx→Unicode, Unicode→OEMxxx, Unicode→Unicode)</li>
 </ol>
 </div>
 
diff --git a/documents/doc/config.html b/documents/doc/config.html
index b032826..502bd33 100644
--- a/documents/doc/config.html
+++ b/documents/doc/config.html
@@ -118,7 +118,7 @@
 <h3>Namespace and Locale Configurations</h3>
 
 <h4 id="code_page">FF_CODE_PAGE</h4>
-<p>This option specifies the OEM code page used on the target system. Incorrect setting of the code page can cause a file open failure. If any non-ASCII character is not used for path name or character encoding is Unicode, there is no difference between any code page settings. Set it 437 anyway.</p>
+<p>This option specifies the OEM code page used on the target system. Incorrect setting of the code page can cause a file open failure. If any non-ASCII character is not used for the path name or character encoding is in Unicode, there is no difference between any code page settings. Set it 437 anyway.</p>
 <table class="lst1">
 <tr><th>Value</th><th>Code page</th></tr>
 <tr><td>0</td><td>Includes all code pages below and set by <tt>f_setcp()</tt></td></tr>
@@ -156,10 +156,10 @@
 </table>
 
 <h4 id="max_lfn">FF_MAX_LFN</h4>
-<p>LFN function requiers certain internal working buffer for the file name. This option defines size of the buffer and the value can be in range of 12 to 255 in UTF-16 encoding unit of the LFN. The buffer occupies <tt>(FF_MAX_LFN + 1) * 2</tt> bytes and additional <tt>(FF_MAX_LFN + 44) / 15 * 32</tt> bytes when exFAT is enabled. It is recommended to be set 255 to fully support the LFN specification. This option has no effect when LFN is not enabled.</p>
+<p>LFN function requiers certain internal working buffer for the file name. This option defines size of the buffer and the value can be in range of 12 to 255 characters (actually in UTF-16 code units) of the LFN. The buffer occupies <tt>(FF_MAX_LFN + 1) * 2</tt> bytes and additional <tt>(FF_MAX_LFN + 44) / 15 * 32</tt> bytes when exFAT is enabled. It is recommended to be set 255 to fully support the LFN specification. This option has no effect when LFN is not enabled.</p>
 
 <h4 id="lfn_unicode">FF_LFN_UNICODE</h4>
-<p>This option switches character encoding for the file name on the API. When Unicode is selected, <tt>FF_CODE_PAGE</tt> has actually no meaning except for compatibility with legacy systems, such as MS-DOS and any system without support for LFN. FatFs supports the code point up to U+10FFFF.</p>
+<p>This option switches character encoding for the file name on the API. FatFs supports the code point up to U+10FFFF. This option also affects behavior of string I/O functions (see <tt>FF_STRF_ENCODE</tt>).</p>
 <table class="lst2">
 <tr><th>Value</th><th>Character Encoding</th><th><tt>TCHAR</tt></th></tr>
 <tr><td>0</td><td>ANSI/OEM in current CP</td><td>char</td></tr>
@@ -167,14 +167,15 @@
 <tr><td>2</td><td>Unicode in UTF-8</td><td>char</td></tr>
 <tr><td>3</td><td>Unicode in UTF-32</td><td>DWORD</td></tr>
 </table>
-<p>This option also affects behavior of string I/O functions (see <tt>FF_STRF_ENCODE</tt>). When LFN is not enabled, this option has no effect and FatFs works at ANSI/OEM code on the API. For more information, read <a href="filename.html#uni">here</a>.</p>
+<p>When Unicode is selected, <tt>FF_CODE_PAGE</tt> has actually no meaning except for compatibility with legacy systems, such as MS-DOS and any system without support for LFN.</p>
+<p>When LFN is not enabled, this option has no effect and FatFs works in ANSI/OEM code on the API. For more information, read <a href="filename.html#uni">here</a>.</p>
 
 <h4 id="lfn_buf">FF_LFN_BUF, FF_SFN_BUF</h4>
-<p>This set of options defines size of file name members, <tt>fname[]</tt> and <tt>altname[]</tt>, in the <tt><a href="sfileinfo.html">FILINFO</a></tt> structure which is used to read out the directory items. These values should be suffcient for the file names to read. The maximum possible length of read file name depends on the character encoding on the API as follows:</p>
+<p>This set of options defines size of file name members, <tt>fname[]</tt> and <tt>altname[]</tt>, in the <tt><a href="sfileinfo.html">FILINFO</a></tt> structure which is used to read out the directory items. These values should be suffcient for the file names to read. The maximum possible length of read file name depends on the character encoding scheme on the API as follows:</p>
 <table class="lst2">
 <tr><th>Encoding</th><th>LFN length</th><th>SFN length</th></tr>
-<tr><td>ANSI/OEM at SBCS</td><td>255 items</td><td>12 items</td></tr>
-<tr><td>ANSI/OEM at DBCS</td><td>510 items</td><td>12 items</td></tr>
+<tr><td>ANSI/OEM in SBCS</td><td>255 items</td><td>12 items</td></tr>
+<tr><td>ANSI/OEM in DBCS</td><td>510 items</td><td>12 items</td></tr>
 <tr><td>Unicode in UTF-16/32</td><td>255 items</td><td>12 items</td></tr>
 <tr><td>Unicode in UTF-8</td><td>765 items</td><td>34 items</td></tr>
 </table>
@@ -252,13 +253,13 @@ const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sdc","usb"};
 <p>This option switches support for exFAT filesystem in addition to the FAT/FAT32 filesystem, Enabled (1) or Disabled (0). To enable exFAT, also LFN must be enabled and configureing <tt>FF_LFN_UNICODE &gt;= 1</tt> and <tt>FF_MAX_LFN == 255</tt> is recommended for full-featured exFAT function. Note that enabling exFAT discards ANSI C (C89) compatibility and wants C99 because of need for 64-bit integer type.</p>
 
 <h4 id="fs_nortc">FF_FS_NORTC</h4>
-<p>Use RTC (0) or Do not use RTC (1). This option controls timestamp function. If the system does not have any RTC function or valid timestamp is not needed, set <tt>FF_FS_NORTC</tt> to 1 to disable the timestamp function. Every objects modified by FatFs will have a fixed timestamp defined by <tt>FF_NORTC_MON</tt>, <tt>FF_NORTC_MDAY</tt> and <tt>FF_NORTC_YEAR</tt>. To use the timestamp function, set <tt>FF_FS_NORTC == 0</tt> and add <tt>get_fattime</tt> function to the project to get current time form the RTC. This option has no effect at read-only configuration.</p>
+<p>Use RTC (0) or Do not use RTC (1). This option controls timestamp function. If the system does not have any RTC function or valid timestamp is not needed, set <tt>FF_FS_NORTC</tt> to 1 to disable the timestamp function. Every objects modified by FatFs will have a fixed timestamp defined by <tt>FF_NORTC_MON</tt>, <tt>FF_NORTC_MDAY</tt> and <tt>FF_NORTC_YEAR</tt>. To use the timestamp function, set <tt>FF_FS_NORTC == 0</tt> and add <tt>get_fattime</tt> function to the project to get current time form the RTC. This option has no effect in read-only configuration.</p>
 
 <h4 id="nortc_time">FF_NORTC_MON, FF_NORTC_MDAY, FF_NORTC_YEAR</h4>
-<p>This set of options defines the time to be used at no RTC systems. This option has no effect at read-only configuration or <tt>FF_FS_NORTC == 0</tt>.</p>
+<p>This set of options defines the time to be used in no RTC systems. This option has no effect in read-only configuration or <tt>FF_FS_NORTC == 0</tt>.</p>
 
 <h4 id="fs_nofsinfo">FF_FS_NOFSINFO</h4>
-<p>0 to 3. If you need to know correct free space on the FAT32 volume, set bit 0 of this option, and <tt>f_getfree</tt> function at first time after volume mount will force a full FAT scan. Bit 1 controls the use of last allocated cluster number.</p>
+<p>0 to 3. If you need to know correct free space on the FAT32 volume, set bit 0 of this option, and <tt>f_getfree</tt> function at first time after volume mount will force a full FAT scan. Bit 1 controls the use of last allocated cluster number for new allocation.</p>
 <table class="lst1">
 <tr><th>Value</th><th>Description</th></tr>
 <tr><td>bit0=0</td><td>Use free cluster count in the FSINFO if available.</td></tr>
@@ -268,7 +269,7 @@ const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sdc","usb"};
 </table>
 
 <h4 id="fs_lock">FF_FS_LOCK</h4>
-<p>This option switches file lock function to control duplicated file open and illegal operations to open objects. Note that the file lock function is independent of re-entrancy. This option must be 0 at read-only configuration.</p>
+<p>This option switches file lock function to control duplicated file open and illegal operations to open objects. Note that the file lock function is independent of re-entrancy. This option must be 0 in read-only configuration.</p>
 <table class="lst1">
 <tr><th>Value</th><th>Description</th></tr>
 <tr><td>0</td><td>Disable file lock function. To avoid collapsing file by wrong file operation, application program needs to avoid illegal open, remove and rename to the open objects.</td></tr>
diff --git a/documents/doc/dioctl.html b/documents/doc/dioctl.html
index 0eacd48..b5a2826 100644
--- a/documents/doc/dioctl.html
+++ b/documents/doc/dioctl.html
@@ -59,7 +59,7 @@ DRESULT disk_ioctl (
 <tr><th>Command</th><th>Description</th></tr>
 <tr><td>CTRL_SYNC</td><td>Makes sure that the device has finished pending write process. If the disk I/O layer or storage device has a write-back cache, the dirty cache data must be committed to media immediately. Nothing to do for this command if each write operation to the media is completed within the <tt>disk_write</tt> function.</td></tr>
 <tr><td>GET_SECTOR_COUNT</td><td>Retrieves number of available sectors, the largest allowable LBA + 1, on the drive into the <tt>LBA_t</tt> variable pointed by <tt class="arg">buff</tt>. This command is used by <tt>f_mkfs</tt> and <tt>f_fdisk</tt> function to determine the size of volume/partition to be created. It is required when <tt>FF_USE_MKFS == 1</tt>.</td></tr>
-<tr><td>GET_SECTOR_SIZE</td><td>Retrieves sector size used for read/write function into the <tt>WORD</tt> variable pointed by <tt class="arg">buff</tt>. Valid sector sizes are 512, 1024, 2048 and 4096. This command is required only if <tt>FF_MAX_SS &gt; FF_MIN_SS</tt>. When <tt>FF_MAX_SS == FF_MIN_SS</tt>, this command will be never used and the read/write function must work in <tt>FF_MAX_SS</tt> bytes/sector only.</td></tr>
+<tr><td>GET_SECTOR_SIZE</td><td>Retrieves sector size, minimum data unit for generic read/write, into the <tt>WORD</tt> variable pointed by <tt class="arg">buff</tt>. Valid sector sizes are 512, 1024, 2048 and 4096. This command is required only if <tt>FF_MAX_SS &gt; FF_MIN_SS</tt>. When <tt>FF_MAX_SS == FF_MIN_SS</tt>, this command will be never used and the read/write function must work in <tt>FF_MAX_SS</tt> bytes/sector.</td></tr>
 <tr><td>GET_BLOCK_SIZE</td><td>Retrieves erase block size of the flash memory media in unit of sector into the <tt>DWORD</tt> variable pointed by <tt class="arg">buff</tt>. The allowable value is 1 to 32768 in power of 2. Return 1 if the erase block size is unknown or non flash memory media. This command is used by only <tt>f_mkfs</tt> function and it attempts to align data area on the erase block boundary. It is required when <tt>FF_USE_MKFS == 1</tt>.</td></tr>
 <tr><td>CTRL_TRIM</td><td>Informs the device the data on the block of sectors is no longer needed and it can be erased. The sector block is specified in an <tt>LBA_t</tt> array {&lt;Start LBA&gt;, &lt;End LBA&gt;} pointed by <tt class="arg">buff</tt>. This is an identical command to Trim of ATA device. Nothing to do for this command if this funcion is not supported or not a flash memory device. FatFs does not check the result code and the file function is not affected even if the sector block was not erased well. This command is called on remove a cluster chain and in the <tt>f_mkfs</tt> function. It is required when <tt>FF_USE_TRIM == 1</tt>.</td></tr>
 </table>
diff --git a/documents/doc/dstat.html b/documents/doc/dstat.html
index c96720a..1456668 100644
--- a/documents/doc/dstat.html
+++ b/documents/doc/dstat.html
@@ -25,7 +25,7 @@ DSTATUS disk_status (
 <h4>Parameter</h4>
 <dl class="par">
 <dt>pdrv</dt>
-<dd>Physical drive number to identify the target device. Always zero at single drive system.</dd>
+<dd>Physical drive number to identify the target device. Always zero in single drive system.</dd>
 </dl>
 </div>
 
@@ -37,9 +37,9 @@ DSTATUS disk_status (
 <dt>STA_NOINIT</dt>
 <dd>Indicates that the device has not been initialized and not ready to work. This flag is set on system reset, media removal or failure of <a href="dinit.html"><tt>disk_initialize</tt></a> function. It is cleared on <tt>disk_initialize</tt> function succeeded. Any media change that occurs asynchronously must be captured and reflect it to the status flags, or auto-mount function will not work correctly. If the system does not support media change detection, application program needs to explicitly re-mount the volume with <tt>f_mount</tt> function after each media change.</dd>
 <dt>STA_NODISK</dt>
-<dd>Indicates that no medium in the drive. This is always cleared at fixed disk drive. Note that FatFs does not refer this flag.</dd>
+<dd>Indicates that no medium in the drive. This is always cleared when the drive is non-removable class. Note that FatFs does not refer this flag.</dd>
 <dt>STA_PROTECT</dt>
-<dd>Indicates that the medium is write protected. This is always cleared at the drives without write protect function. Not valid if <tt>STA_NODISK</tt> is set.</dd>
+<dd>Indicates that the medium is write protected. This is always cleared when the drive has no write protect function. Not valid if <tt>STA_NODISK</tt> is set.</dd>
 </dl>
 </div>
 
diff --git a/documents/doc/dwrite.html b/documents/doc/dwrite.html
index 0241245..f94ff7b 100644
--- a/documents/doc/dwrite.html
+++ b/documents/doc/dwrite.html
@@ -60,7 +60,7 @@ DRESULT disk_write (
 <h4>Description</h4>
 <p>The specified memory address is not that always aligned to word boundary because the argument is defined as <tt>BYTE*</tt>. For more information, refer to the description of <a href="dread.html"><tt>disk_read</tt></a> function.</p>
 <p>Generally, a multiple sector write request (<tt class="arg">count</tt><tt> &gt; 1</tt>) must not be split into single sector transactions to the storage device, or the file write throughput will be drastically decreased.</p>
-<p>FatFs expects delayed write function of the disk control layer. The write operation to the media does not need to be completed at return from this function by what write operation is in progress or data is only stored into the write-back cache. But write data on the <tt class="arg">buff</tt> is invalid after return from this function. The write completion request is done by <tt>CTRL_SYNC</tt> command of <tt><a href="dioctl.html">disk_ioctl</a></tt> function. Therefore, if a delayed write function is implemented, the write throughput of the filesystem will be improved.</p>
+<p>FatFs expects delayed write function of the disk control layer. The write operation to the media does not need to be completed when return from this function by what write operation is in progress or data is only stored into the write-back cache. But write data on the <tt class="arg">buff</tt> is invalid after return from this function. The write completion request is done by <tt>CTRL_SYNC</tt> command of <tt><a href="dioctl.html">disk_ioctl</a></tt> function. Therefore, if a delayed write function is implemented, the write throughput of the filesystem will be improved.</p>
 <p><em>Remarks: Application program MUST NOT call this function, or FAT structure on the volume can be collapsed.</em></p>
 </div>
 
diff --git a/documents/doc/expand.html b/documents/doc/expand.html
index 8588f32..6aec295 100644
--- a/documents/doc/expand.html
+++ b/documents/doc/expand.html
@@ -52,16 +52,16 @@ FRESULT f_expand (
 
 <div class="para desc">
 <h4>Description</h4>
-<p>The <tt>f_expand</tt> function prepares or allocates a contiguous data area to the file. When <tt class="arg">opt</tt> is 1, the function allocates a contiguous data area to the file. Unlike expansion of file size by <tt>f_lseek</tt> function, the file must be truncated prior to use this function and read/write pointer of the file stays at offset 0 after the function call. The file content allocated with this function is <em>undefined</em> because no data is written to the file in this process. The function can fail with <tt>FR_DENIED</tt> due to some reasons below.</p>
+<p>The <tt>f_expand</tt> function prepares or allocates a contiguous data area to the file. When <tt class="arg">opt</tt> is 1, the data area is allocated to the file in this function. Unlike expansion of file size by <tt>f_lseek</tt> function, the file must be truncated prior to use this function and read/write pointer of the file stays at offset 0 after the function call. The file content allocated with this function is <em>undefined</em> because no data is written to the file in this process. The function can fail with <tt>FR_DENIED</tt> due to some reasons below.</p>
 <ul>
 <li>No free contiguous space was found.</li>
 <li>Size of the file was not zero.</li>
 <li>The file has been opened in read-only mode.</li>
 <li>Not allowable file size. (&gt;= 4 GB on FAT volume)</li>
 </ul>
-<p>When <tt class="arg">opt</tt> is 0, the function finds a contiguous data area and set it as suggested point for next allocation. The subsequent cluster allocation begins at top of the contiguous area found by this function. Thus the file allocation is guaranteed be contiguous and without allocation delay until the file size reaches that size unless any other changes to the volume is performed.</p>
+<p>When <tt class="arg">opt</tt> is 0, the function finds a contiguous data area and set it as suggested point for next allocation. The subsequent cluster allocation begins at top of the contiguous area found by this function. Thus the file allocation is guaranteed be contiguous and without allocation delay until the file size reaches this size unless any other changes to the volume is performed.</p>
 <p>The contiguous file has an advantage for time-critical read/write operations. It eliminates some overheads in the filesystem and the storage device caused by random access for fragmented file.</p>
-<p>Also the contiguous file can be easily accessed directly via low-level disk functions. But this is not recommended in consideration for portability and future compatibility. If the file has not been confirmed be contiguous, use <a href="../res/app5.c">this function</a> to examine if the file is contiguous or not.</p>
+<p>Also the contiguous file can be easily accessed directly via low-level disk functions. However, this is not recommended in consideration of portability and future compatibility. If the file has not been confirmed be contiguous, use <a href="../res/app5.c">this function</a> to examine if the file is contiguous or not.</p>
 </div>
 
 <div class="para comp">
diff --git a/documents/doc/findfirst.html b/documents/doc/findfirst.html
index 495cfad..fd90443 100644
--- a/documents/doc/findfirst.html
+++ b/documents/doc/findfirst.html
@@ -61,8 +61,15 @@ FRESULT f_findfirst (
 
 <div class="para desc">
 <h4>Description</h4>
-<p>After the directory specified by <tt class="arg">path</tt> could be opened, it starts to search the directory for items with the matching pattern specified by <tt class="arg">pattern</tt>. If the first item is found, the information about the item is stored into the file information structure <tt class="arg">fno</tt>.</p>
-<p>The matching pattern can contain wildcard characters (<tt>?</tt> and <tt>*</tt>). For example, a <tt>?</tt> matches an any character, an <tt>*</tt> matches an any string in length of zero or longer and ???* matches an any string in length of 3 characters or longer. When LFN is enabled, only <tt>fname[]</tt> is tested when <tt>FF_USE_FIND == 1</tt> and also <tt>altname[]</tt> is tested when <tt>FF_USE_FIND == 2</tt>. In this revision, there are some differences listed below between FatFs and standard systems in matching condition.</p>
+<p>After the directory specified by <tt class="arg">path</tt> could be opened, it starts to search the directory for items with the matching pattern specified by <tt class="arg">pattern</tt>. If the first item is found, the information about the item is stored into the file information structure <tt class="arg">fno</tt>. If not found, <tt>fno-&gt;fname[]</tt> has a null string.</p>
+<p>The matching pattern string can contain wildcard terms. For example:</p>
+<ul>
+<li><tt>?</tt> - An any character.</li>
+<li><tt>???</tt> - Any string in length of three characters.</li>
+<li><tt>*</tt> - Any string in length of zero or longer.</li>
+<li><tt>????*</tt> - Any string in length of four characters or longer.</li>
+</ul>
+<p>Since the matching algorithm uses recursion, number of wildcard terms in the matching pattern is limited to four. Any pattern with too many wildcard terms does not match any name. In LFN configuration, only <tt>fname[]</tt> is tested when <tt>FF_USE_FIND == 1</tt> and also <tt>altname[]</tt> is tested when <tt>FF_USE_FIND == 2</tt>. There are some differences listed below between FatFs and standard systems in matching condition.</p>
 <ul>
 <li><tt>"*.*"</tt> never matches any name without extension while it matches any name with or without extension in standard systems.</li>
 <li>Any pattern terminated with a period never matches any name while it matches the name without extensiton in standard systems.</li>
@@ -88,7 +95,7 @@ void find_image_file (void)
     DIR dj;         <span class="c">/* Directory object */</span>
     FILINFO fno;    <span class="c">/* File information */</span>
 
-    fr = <em>f_findfirst</em>(&amp;dj, &amp;fno, "", "dsc*.jpg");  <span class="c">/* Start to search for photo files */</span>
+    fr = <em>f_findfirst</em>(&amp;dj, &amp;fno, "", "dsc*.jp*");  <span class="c">/* Start to search for photo files */</span>
 
     while (fr == FR_OK &amp;&amp; fno.fname[0]) {         <span class="c">/* Repeat while an item is found */</span>
         printf("%s\n", fno.fname);                <span class="c">/* Print the object name */</span>
diff --git a/documents/doc/forward.html b/documents/doc/forward.html
index 9331aa2..c1527b6 100644
--- a/documents/doc/forward.html
+++ b/documents/doc/forward.html
@@ -65,7 +65,7 @@ FRESULT f_forward (
 
 
 <div class="para use">
-<h4>Example (Audio playback)</h4>
+<h4>Example</h4>
 <pre>
 <span class="c">/*------------------------------------------------------------------------*/</span>
 <span class="c">/* Sample code of data transfer function to be called back from f_forward */</span>
diff --git a/documents/doc/getlabel.html b/documents/doc/getlabel.html
index fc86131..ea2a016 100644
--- a/documents/doc/getlabel.html
+++ b/documents/doc/getlabel.html
@@ -34,7 +34,7 @@ FRESULT f_getlabel (
 <tr><td>Configuration</td><td>FF_FS_EXFAT == 0</td><td>FF_FS_EXFAT == 1</td></tr>
 <tr><td>FF_USE_LFN == 0</td><td>12 items</td><td>-</td></tr>
 <tr><td>FF_LFN_UNICODE == 0</td><td>12 items</td><td>23 items</td></tr>
-<tr><td>FF_LFN_UNICODE == 1/3</td><td>12 items</td><td>12 items</td></tr>
+<tr><td>FF_LFN_UNICODE == 1,3</td><td>12 items</td><td>12 items</td></tr>
 <tr><td>FF_LFN_UNICODE == 2</td><td>34 items</td><td>34 items</td></tr>
 </table>
 </dd>
diff --git a/documents/doc/lseek.html b/documents/doc/lseek.html
index e21a1c4..cb01d16 100644
--- a/documents/doc/lseek.html
+++ b/documents/doc/lseek.html
@@ -21,6 +21,11 @@ FRESULT f_lseek (
   FSIZE_t <span class="arg">ofs</span>  <span class="c">/* [IN] File read/write pointer */</span>
 );
 </pre>
+<pre>
+FRESULT f_rewind (
+  FIL*    <span class="arg">fp</span>,  <span class="c">/* [IN] File object */</span>
+);
+</pre>
 </div>
 
 <div class="para arg">
@@ -48,14 +53,17 @@ FRESULT f_lseek (
 
 <div class="para desc">
 <h4>Description</h4>
-<p>File read/write ponter in the open file object points the data byte to be read/written at next read/write operation. It advances as the number of bytes read/written. The <tt>f_lseek</tt> function moves the file read/write pointer without any read/write operation to the file.</p>
-<p>When an offset beyond the file size is specified in write mode, the file size is expanded to the specified offset. The file data in the expanded part is <em>undefined</em> because no data is written to the file in this process. This is suitable to pre-allocate a data area to the file quickly for fast write operation. When a contiguous data area needs to be allocated to the file, use <tt>f_expand</tt> function instead. After the <tt>f_lseek</tt> function succeeded, the current read/write pointer should be checked in order to make sure the read/write pointer has been moved correctry. In case of the read/write pointer is not the expected value, either of followings has been occured.</p>
+<p>File read/write ponter in the open file object points the data byte to be read/written at next read/write operation. It advances as the number of bytes read/written. The <tt>f_lseek</tt> function moves the file read/write pointer without any read/write operation to the file. The <tt>f_rewind</tt> function is impremented as a macro.</p>
+<pre>
+#define <em>f_rewind</em>(fp) f_lseek((fp), 0)
+</pre>
+<p>If an offset beyond the file size is specified in write mode, the file size is expanded to the specified offset. The file data in the expanded part is <em>undefined</em> because no data is written to the file in this process. This is suitable to pre-allocate a data area to the file quickly for fast write operation. When a contiguous data area needs to be allocated to the file, use <tt>f_expand</tt> function instead. After the <tt>f_lseek</tt> function succeeded, the current read/write pointer should be checked in order to make sure the read/write pointer has been moved correctry. In case of the read/write pointer is not the expected value, either of followings has been occured.</p>
 <ul>
 <li>End of file. The specified <tt class="arg">ofs</tt> was clipped at end of the file because the file has been opened in read-only mode.</li>
 <li>Disk full. There is no free space on the volume to expand the file.</li>
 </ul>
 <p>The fast seek feature enables fast backward/long seek operations without FAT access by using an on-memory CLMT (cluster link map table). It is applied to <tt>f_read</tt> and <tt>f_write</tt> function as well, however, the file size cannot be expanded by <tt>f_write</tt>, <tt>f_lseek</tt> function while the file is at fast seek mode.</p>
-<p>The fast seek mode is enabled when <tt>FF_USE_FASTSEEK = 1</tt>. The CLMT must be created into the <tt>DWORD</tt> array prior to use the fast seek mode. To create the CLMT, set address of the <tt>DWORD</tt> array to the member <tt>cltbl</tt> in the open file object, set the size of array in unit of items to the first item and call <tt>f_lseek</tt> function with <tt class="arg">ofs</tt><tt> = CREATE_LINKMAP</tt>. After the function succeeded and CLMT is created, no FAT access is occured in subsequent <tt>f_read</tt>, <tt>f_write</tt>, <tt>f_lseek</tt> function to the file. The number of items used or required is returned into the first item of the array. The number of items to be used is (number of the file fragments + 1) * 2. For example, 12 items in the array will be used for the file fragmented in 5 portions. If the function failed with <tt>FR_NOT_ENOUGH_CORE</tt>, the size of given array is insufficient for the file.</p>
+<p>The fast seek mode is enabled when <tt>FF_USE_FASTSEEK = 1</tt>. The CLMT must be created into the <tt>DWORD</tt> array prior to use the fast seek mode. To create the CLMT, set address of the <tt>DWORD</tt> array to the member <tt>cltbl</tt> in the open file object, set the size of array in unit of items to the <tt>cltbl[0]</tt> and then call <tt>f_lseek</tt> function with <tt class="arg">ofs</tt><tt> = CREATE_LINKMAP</tt>. After the function succeeded, no FAT access is occured in subsequent <tt>f_read</tt>, <tt>f_write</tt>, <tt>f_lseek</tt> function to the file. The number of items used or required is returned into the <tt>cltbl[0]</tt>. The number of items needed is (number of the file fragments + 1) * 2. For example, 12 items in the array will be used for the file fragmented in 5 portions. If the function failed with <tt>FR_NOT_ENOUGH_CORE</tt>, the size of given array is insufficient for the file.</p>
 </div>
 
 
diff --git a/documents/doc/mkfs.html b/documents/doc/mkfs.html
index ebb9726..45fd3ac 100644
--- a/documents/doc/mkfs.html
+++ b/documents/doc/mkfs.html
@@ -16,10 +16,10 @@
 <p>The f_mkfs function creates an FAT/exFAT volume on the logical drive.</p>
 <pre>
 FRESULT f_mkfs (
-  const TCHAR*  <span class="arg">path</span>,  <span class="c">/* [IN] Logical drive number */</span>
+  const TCHAR* <span class="arg">path</span>,   <span class="c">/* [IN] Logical drive number */</span>
   const MKFS_PARM* <span class="arg">opt</span>,<span class="c">/* [IN] Format options */</span>
-  void*  <span class="arg">work</span>,         <span class="c">/* [-]  Working buffer */</span>
-  UINT  <span class="arg">len</span>            <span class="c">/* [IN] Size of working buffer */</span>
+  void* <span class="arg">work</span>,          <span class="c">/* [-]  Working buffer */</span>
+  UINT <span class="arg">len</span>             <span class="c">/* [IN] Size of working buffer */</span>
 );
 </pre>
 </div>
@@ -66,12 +66,12 @@ FRESULT f_mkfs (
 
 <div class="para desc">
 <h4>Description</h4>
-<p>The FAT sub-type, FAT12/FAT16/FAT32, of FAT volume except exFAT is determined by only number of clusters on the volume and nothing else, according to the FAT specification issued by Microsoft. Thus the FAT sub-type of created volume depends on the volume size and the cluster size. In case of the combination of FAT type and cluter size specified by argument cannot be valid on the volume, the function will fail with <tt>FR_MKFS_ABORTED</tt>.</p>
-<p>The allocation unit, also knows as <em>cluster</em>, is a unit of disk space allocation for files. When the size of allocation unit is 32768 bytes, a file with 100 bytes in size occupies 32768 bytes of disk space. The space efficiency of disk usage gets worse as increasing size of allocation unit, but, on the other hand, the read/write performance increases. Therefore the size of allocation unit is a trade-off between space efficiency and performance. For the large storages in GB order, 32768 bytes or larger (this is automatically selected by default) is recommended for most case unless extremely many small files are created on a volume.</p>
+<p>The FAT sub-type, FAT12/FAT16/FAT32, of FAT volume except exFAT is determined by only number of clusters on the volume and nothing else, according to the FAT specification issued by Microsoft. Thus the FAT sub-type of created volume depends on the volume size and the cluster size. In case of the combination of FAT type and cluter size specified by argument is not valid for the volume size, the function will fail with <tt>FR_MKFS_ABORTED</tt>.</p>
+<p>The allocation unit, also known as <em>cluster</em>, is a unit of disk space allocation for files. When the size of allocation unit is 32768 bytes, a file with 100 bytes in size occupies 32768 bytes of disk space. The space efficiency of disk usage gets worse as increasing size of allocation unit, but, on the other hand, the read/write performance increases. Therefore the size of allocation unit is a trade-off between space efficiency and performance. For the large volumes in GB order, 32768 bytes or larger, automatically selected by default, is recommended for most case unless extremely many small files are created in the volume.</p>
 <p>When the logical drive to be formatted is associated with a physical drive (<tt><a href="config.html#multi_partition">FF_MULTI_PARTITION</a> = 0</tt>) and <tt>FM_SFD</tt> flag is not specified, a partition occupies entire disk space is created and then the FAT volume is created in the partition. When <tt>FM_SFD</tt> flag is specified, the FAT volume is created without any disk partitioning.</p>
-<p>When the logical drive to be formatted is associated with a specific partition by multiple partition feature (<tt>FF_MULTI_PARTITION = 1</tt>), the FAT volume is created on the partition specified by the <a href="filename.html#vol">volume mapping table</a> and <tt>FM_SFD</tt> flag is ignored. The physical drive needs to be partitioned with <tt>f_fdisk</tt> function or any partitioning tool prior to create the FAT volume with this function.</p>
-<p>There are three standard disk partitioning formats, MBR, GPT and SFD. The MBR format (aka FDISK format) is usually used for harddisk, memory card and U disk. It can divide a physical drive into one or more partitions with a partition table. The GPT (GUID Partition Table) is a newly defined patitioning format for large storage devices. FatFs suppors the GPT only when 64-bit LBA is enabled. SFD (super-floppy disk) is non-partitioned disk format. The FAT volume occupies the entire physical drive without any disk partitioning. It is usually used for floppy disk, optical disk and most super-floppy media. Some combination of systems and media support only either partitioned format or non-partitioned format and the other is not supported.</p>
-<p>Some systems manage the partitions on the internal storage in non-standard format. The partitions are mapped as physical drives identified in disk_* functions. For such systems, SFD format is suitable to create the FAT volume on the partition.</p>
+<p>When the logical drive to be formatted is associated with a specific partition by multiple partition feature (<tt>FF_MULTI_PARTITION = 1</tt>), the FAT volume is created in the partition of the drive specified by <a href="filename.html#vol">volume mapping table</a> and <tt>FM_SFD</tt> flag is ignored. The corresponding physical drive needs to be partitioned with <tt>f_fdisk</tt> function or any partitioning tool prior to create the FAT volume with this function.</p>
+<p>There are three standard disk partitioning formats, MBR, GPT and SFD. The MBR format, also known as FDISK format, is usually used for harddisk, memory card and U disk. It can divide a physical drive into one or more partitions with a partition table. The GPT (GUID Partition Table) is a newly defined patitioning format for large storage devices. FatFs suppors the GPT only when 64-bit LBA is enabled. SFD (Super-Floppy Disk) is non-partitioned disk format. The FAT volume occupies the entire physical drive without any disk partitioning. It is usually used for floppy disk, optical disk and most super-floppy media. Some combination of systems and media support only either partitioned format or non-partitioned format and the other is not supported.</p>
+<p>Some systems manage the partitions in the on-board storage in non-standard format. The partitions are mapped as physical drives identified by <tt class="arg">pdrv</tt> in <tt>disk_*</tt> functions. For such systems, SFD format is suitable to create the FAT volume in the partition.</p>
 </div>
 
 <div class="para comp">
@@ -96,7 +96,7 @@ int main (void)
     res = <em>f_mkfs</em>("", 0, work, sizeof work);
     if (res) ...
 
-    <span class="c">/* Gives a work area to the default drive */</span>
+    <span class="c">/* Give a work area to the default drive */</span>
     f_mount(&amp;fs, "", 0);
 
     <span class="c">/* Create a file as new */</span>
diff --git a/documents/doc/mount.html b/documents/doc/mount.html
index ed38442..0dc8ce3 100644
--- a/documents/doc/mount.html
+++ b/documents/doc/mount.html
@@ -21,6 +21,11 @@ FRESULT f_mount (
   BYTE         <span class="arg">opt</span>    <span class="c">/* [IN] Initialization option */</span>
 );
 </pre>
+<pre>
+FRESULT f_unmount (
+  const TCHAR* <span class="arg">path</span>,  <span class="c">/* [IN] Logical drive number */</span>
+);
+</pre>
 </div>
 
 <div class="para arg">
@@ -58,7 +63,7 @@ FRESULT f_mount (
 <li>Clears and registers the new work area to the volume if <tt class="arg">fs</tt> is not NULL.</li>
 <li>Performs volume mount process to the volume if forced mounting is specified.</li>
 </ol>
-<p>If there is any open object of file or directory on the logical drive, the object will be invalidated by this function.<p>
+<p>If there is any open object of file or directory on the logical drive, the object will be invalidated by this function.</p>
 <p>If forced mounting is not specified (<tt>opt = 0</tt>), this function always succeeds regardless of the physical drive status. It only clears (de-initializes) the given work area and registers its address to the internal table and no activity of the physical drive in this function. The volume mount process will be attempted on subsequent file/directroy function if the filesystem object is not initialized. (delayed mounting) The volume mount processes, initialize the corresponding physical drive, find the FAT volume in it and then initialize the work area, is performed in the subsequent file/directory functions when either of following conditions is true.</p>
 <ul>
 <li>Filesystem object has not been initialized. It is de-initialized by <tt>f_mount</tt> function.</li>
@@ -66,7 +71,10 @@ FRESULT f_mount (
 </ul>
 <p>If the function with forced mounting (<tt>opt = 1</tt>) failed with <tt>FR_NOT_READY</tt>, it means that the filesystem object has been registered successfully but the volume is currently not ready to work. The volume mount process will be attempted on subsequent file/directroy function.</p>
 <p>If implementation of the disk I/O layer lacks asynchronous media change detection, application program needs to perform <tt>f_mount</tt> function after each media change to force cleared the filesystem object.</p>
-<p>To unregister the work area, specify a NULL to the <tt class="arg">fs</tt>, and then the work area can be discarded.</p>
+<p>To unregister the work area, specify a NULL to the <tt class="arg">fs</tt>, and then the work area can be discarded. <tt>f_unmount</tt> function is implemented as a macro.</p>
+<pre>
+#define <em>f_unmount</em>(path) f_mount(0, path, 0)
+</pre>
 </div>
 
 
diff --git a/documents/doc/open.html b/documents/doc/open.html
index d90e8c4..f41496c 100644
--- a/documents/doc/open.html
+++ b/documents/doc/open.html
@@ -166,8 +166,8 @@ int main (void)
     f_close(&amp;fdst);
 
     <span class="c">/* Unregister work area prior to discard it */</span>
-    f_mount(0, "0:", 0);
-    f_mount(0, "1:", 0);
+    f_unmount("0:");
+    f_unmount("1:");
 
     return (int)fr;
 }
diff --git a/documents/doc/printf.html b/documents/doc/printf.html
index 457b633..d559dd5 100644
--- a/documents/doc/printf.html
+++ b/documents/doc/printf.html
@@ -39,7 +39,7 @@ int f_printf (
 
 <div class="para ret">
 <h4>Return Values</h4>
-<p>When the string was written successfuly, it returns number of character encoding units written to the file. When the function failed due to disk full or any error, an <tt>EOF (-1)</tt> will be returned.</p>
+<p>When the string was written successfuly, it returns number of character encoding units written to the file. When the function failed due to disk full or any error, a negative value will be returned.</p>
 </div>
 
 
diff --git a/documents/doc/putc.html b/documents/doc/putc.html
index 2e9fa99..1b2b26f 100644
--- a/documents/doc/putc.html
+++ b/documents/doc/putc.html
@@ -35,7 +35,7 @@ int f_putc (
 
 <div class="para ret">
 <h4>Return Values</h4>
-<p>When the character was written successfuly, it returns number of character encoding units written to the file. When the function failed due to disk full or any error, an <tt>EOF (-1)</tt> will be returned.</p>
+<p>When the character was written successfuly, it returns number of character encoding units written to the file. When the function failed due to disk full or any error, a negative value will be returned.</p>
 </div>
 
 
diff --git a/documents/doc/puts.html b/documents/doc/puts.html
index 8f2a7ce..9d79a4b 100644
--- a/documents/doc/puts.html
+++ b/documents/doc/puts.html
@@ -35,7 +35,7 @@ int f_puts (
 
 <div class="para ret">
 <h4>Return Value</h4>
-<p>When the string was written successfuly, it returns number of character encoding units written to the file. When the function failed due to disk full or any error, an EOF (-1) will be returned.</p>
+<p>When the string was written successfuly, it returns number of character encoding units written to the file. When the function failed due to disk full or any error, a negative value will be returned.</p>
 </div>
 
 
diff --git a/documents/doc/readdir.html b/documents/doc/readdir.html
index 80ce50a..77c8148 100644
--- a/documents/doc/readdir.html
+++ b/documents/doc/readdir.html
@@ -20,6 +20,11 @@ FRESULT f_readdir (
   FILINFO* <span class="arg">fno</span>  <span class="c">/* [OUT] File information structure */</span>
 );
 </pre>
+<pre>
+FRESULT f_rewinddir (
+  DIR* <span class="arg">dp</span>,      <span class="c">/* [IN] Directory object */</span>
+);
+</pre>
 </div>
 
 <div class="para arg">
@@ -48,15 +53,19 @@ FRESULT f_readdir (
 
 <div class="para desc">
 <h4>Description</h4>
-<p>The <tt>f_readdir</tt> function reads a directory item, informations about the object. Items in the directory can be read in sequence by <tt>f_readdir</tt> function calls. Dot entries (<tt>"."</tt> and <tt>".."</tt>) in the sub-directory are filtered out and they will never appear in the read items. When all directory items have been read and no item to read, a null string is stored into the <tt>fno-&gt;fname[]</tt> without any error. When a null pointer is given to the <tt class="arg">fno</tt>, the read index of the directory object is rewinded.</p>
-<p>When support of long file name (LFN) is enabled, a member <tt>altname[]</tt> is defined in the file information structure to store the short file name of the object. If the long file name is not accessible due to some reason listed below, short file name is stored to the <tt>fname[]</tt> and <tt>altname[]</tt> has a null string.</p>
+<p>The <tt>f_readdir</tt> function reads a directory item, informations about the object. Items in the directory can be read in sequence by <tt>f_readdir</tt> function calls. When all items in the directory have been read and no item to read, a null string is stored into the <tt>fno-&gt;fname[]</tt> without any error. When a null pointer is given to the <tt class="arg">fno</tt>, the read index of the directory object is rewinded. The <tt>f_rewinddir</tt> function is implemented as a macro.</p>
+<pre>
+#define <em>f_rewinddir</em>(dp) f_readdir((dp), 0)
+</pre>
+<p>When LFN is enabled, a member <tt>altname[]</tt> is defined in the file information structure to store the short file name of the object. If the long file name is not accessible due to some reason listed below, short file name is stored to the <tt>fname[]</tt> and <tt>altname[]</tt> has a null string.</p>
 <ul>
-<li>The item has no LFN. (Not the case at exFAT volume)</li>
-<li>Setting of <a href="config.html#max_lfn"><tt>FF_MAX_LFN</tt></a> is insufficient to handle the LFN. (Not the case at <tt>FF_MAX_LFN == 255</tt>)</li>
-<li>Setting of <a href="config.html#lfn_buf"><tt>FF_LFN_BUF</tt></a> is insufficient to store the LFN.</li>
-<li>The LFN contains some character not defined in current code page. (Not the case at <tt>FF_LFN_UNICODE &gt;= 1</tt>)</li>
+<li>The item has no LFN. (Not the case in exFAT volume)</li>
+<li><a href="config.html#max_lfn"><tt>FF_MAX_LFN</tt></a> is insufficient to handle the LFN. (Not the case in <tt>FF_MAX_LFN == 255</tt>)</li>
+<li><a href="config.html#lfn_buf"><tt>FF_LFN_BUF</tt></a> is insufficient to output the LFN.</li>
+<li>The LFN contains some character not defined in current CP. (Not the case in <tt>FF_LFN_UNICODE != 0</tt>)</li>
 </ul>
-<p>There is a problem on reading a directory of exFAT volume. The exFAT does not support short file name. This means no name can be returned on the condition above. If it is the case, "?" is returned into the <tt>fname[]</tt> to indicate that the object is not accessible. To avoid this problem, configure FatFs <tt><a href="config.html#lfn_unicode">FF_LFN_UNICODE</a> &gt;= 1</tt> and <tt>FF_MAX_LFN == 255</tt> to support the full feature of LFN specification.</p>
+<p>There is a problem on read a directory of exFAT volume. The exFAT does not support short file name. This means no name can be returned on the condition above. If it is the case, "?" is returned as the file name to indicate that the object is not accessible. To avoid this problem, configure FatFs <tt><a href="config.html#lfn_unicode">FF_LFN_UNICODE</a> != 0</tt> and <tt>FF_MAX_LFN == 255</tt> to support the full feature of LFN specification.</p>
+<p>Dot entries (<tt>"."</tt> and <tt>".."</tt>) in the sub-directory of FAT volume are filtered out and they will never appear in the read items because exFAT lacks dot entries in the sub-directory.</p>
 </div>
 
 
diff --git a/documents/doc/sfileinfo.html b/documents/doc/sfileinfo.html
index c0fd55f..56fad39 100644
--- a/documents/doc/sfileinfo.html
+++ b/documents/doc/sfileinfo.html
@@ -68,7 +68,7 @@
 </table>
 </dd>
 <dt>fname[]</dt>
-<dd>Null-terminated object name. A null string is stored when no item to read and it indicates this structure is invalid. The size of <tt>fname[]</tt> and <tt>altname[]</tt> each can be configured at LFN configuration.</dd>
+<dd>Null-terminated object name. A null string is stored when no item to read and it indicates this structure is invalid. The size of <tt>fname[]</tt> and <tt>altname[]</tt> each can be configured in LFN configuration.</dd>
 <dt>altname[]</dt>
 <dd>Alternative object name is stored if available. This member is not available in non-LFN configuration.</dd>
 </dl>
diff --git a/documents/updates.txt b/documents/updates.txt
index 9825533..b1a32b4 100644
--- a/documents/updates.txt
+++ b/documents/updates.txt
@@ -1,3 +1,9 @@
+R0.14a (December 05, 2020)
+  Limited number of recursive calls in f_findnext().
+  Fixed old floppy disks formatted with MS-DOS 2.x and 3.x cannot be mounted.
+  Fixed some compiler warnings.
+
+
 R0.14 (October 14, 2019)
   Added support for 64-bit LBA and GUID partition table (FF_LBA64 = 1)
   Changed some API functions, f_mkfs() and f_fdisk().
@@ -12,12 +18,14 @@ R0.13c (October 14, 2018)
   Fixed creating a sub-directory in the fragmented sub-directory on the exFAT volume collapses FAT chain of the parent directory. (appeared at R0.12)
   Fixed f_getcwd() cause output buffer overrun when the buffer has a valid drive number. (appeared at R0.13b)
 
+
 R0.13b (April 07, 2018)
   Added support for UTF-32 encoding on the API. (FF_LFN_UNICODE = 3)
   Added support for Unix style volume prefix. (FF_STR_VOLUME_ID = 2)
   Fixed accesing any object on the exFAT root directory beyond the cluster boundary can fail. (appeared at R0.12c)
   Fixed f_setlabel() does not reject some invalid characters. (appeared at R0.09b)
 
+
 R0.13a (October 14, 2017)
   Added support for UTF-8 encoding on the API. (FF_LFN_UNICODE = 2)
   Added options for file name output buffer. (FF_LFN_BUF, FF_SFN_BUF).
@@ -26,6 +34,7 @@ R0.13a (October 14, 2017)
   Fixed f_unlink() can cause lost clusters at fragmented file on the exFAT volume. (appeared at R0.12c)
   Fixed f_setlabel() rejects some valid characters for exFAT volume. (appeared at R0.12)
 
+
 R0.13 (May 21, 2017)
   Changed heading character of configuration keywords "_" to "FF_".
   Removed ASCII-only configuration, FF_CODE_PAGE = 1. Use FF_CODE_PAGE = 437 instead.
@@ -37,12 +46,14 @@ R0.13 (May 21, 2017)
   Fixed exFAT FAT entry can be collapsed when write or lseek operation to the existing file is done. (appeared at R0.12c)
   Fixed creating a file can fail when a new cluster allocation to the exFAT directory occures. (appeared at R0.12c)
 
+
 R0.12c (March 04, 2017)
   Improved write throughput at the fragmented file on the exFAT volume.
   Made memory usage for exFAT be able to be reduced as decreasing _MAX_LFN.
   Fixed successive f_getfree() can return wrong count on the FAT12/16 volume. (appeared at R0.12)
   Fixed configuration option _VOLUMES cannot be set 10. (appeared at R0.10c)
 
+
 R0.12b (September 4, 2016)
   Made f_rename() be able to rename objects with the same name but case.
   Fixed an error in the case conversion teble of code page 866. (ff.c)
@@ -53,6 +64,7 @@ R0.12b (September 4, 2016)
   Fixed large file allocation/removing on the exFAT volume collapses allocation bitmap. (appeared at R0.12)
   Fixed some internal errors in f_expand() and f_lseek(). (appeared at R0.12)
 
+
 R0.12a (July 10, 2016)
   Added support for creating exFAT volume with some changes of f_mkfs().
   Added a file open method FA_OPEN_APPEND. An f_lseek() following f_open() is no longer needed.
@@ -61,6 +73,7 @@ R0.12a (July 10, 2016)
   Fixed wrong memory read in create_name(). (appeared at R0.12)
   Fixed compilation fails at some configurations, _USE_FASTSEEK and _USE_FORWARD.
 
+
 R0.12 (April 12, 2016)
   Added support for exFAT file system. (_FS_EXFAT)
   Added f_expand(). (_USE_EXPAND)
@@ -68,6 +81,7 @@ R0.12 (April 12, 2016)
   Added an option _USE_CHMOD and removed an option _WORD_ACCESS.
   Fixed errors in the case conversion teble of Unicode (cc*.c).
 
+
 R0.11a (September 5, 2015)
   Fixed wrong media change can lead a deadlock at thread-safe configuration.
   Added code page 771, 860, 861, 863, 864, 865 and 869. (_CODE_PAGE)
@@ -75,21 +89,25 @@ R0.11a (September 5, 2015)
   Fixed errors in the case conversion teble of code page 437 and 850 (ff.c).
   Fixed errors in the case conversion teble of Unicode (cc*.c).
 
+
 R0.11 (February 9, 2015)
   Added f_findfirst() and f_findnext(). (_USE_FIND)
   Fixed f_unlink() does not remove cluster chain of the file. (appeared at R0.10c)
   Fixed _FS_NORTC option does not work properly. (appeared at R0.10c)
 
+
 R0.10c (November 9, 2014)
   Added a configuration option for the platforms without RTC. (_FS_NORTC)
   Fixed volume label created by Mac OS X cannot be retrieved with f_getlabel(). (appeared at R0.09b)
   Fixed a potential problem of FAT access that can appear on disk error.
   Fixed null pointer dereference on attempting to delete the root direcotry. (appeared at R0.08)
 
+
 R0.10b (May 19, 2014)
   Fixed a hard error in the disk I/O layer can collapse the directory entry.
   Fixed LFN entry is not deleted on delete/rename an object with its lossy converted SFN. (appeared at R0.07)
 
+
 R0.10a (January 15, 2014)
   Added arbitrary strings as drive number in the path name. (_STR_VOLUME_ID)
   Added an option for minimum sector size. (_MIN_SS)
@@ -99,6 +117,7 @@ R0.10a (January 15, 2014)
   Fixed volume lock is left acquired after return from f_closedir(). (appeared at R0.10)
   Fixed creation of a directory entry with LFN fails on too many SFN collisions. (appeared at R0.07)
 
+
 R0.10 (October 2, 2013)
   Added an option for character encoding on the file. (_STRF_ENCODE)
   Added f_closedir().
@@ -110,24 +129,29 @@ R0.10 (October 2, 2013)
   Fixed f_write() can be truncated when the file size is close to 4GB.
   Fixed f_open(), f_mkdir() and f_setlabel() can return incorrect result code on error.
 
+
 R0.09b (January 24, 2013)
   Added f_getlabel() and f_setlabel(). (_USE_LABEL = 1)
 
+
 R0.09a (August 27, 2012)
   Fixed assertion failure due to OS/2 EA on FAT12/16 volume.
   Changed file functions reject null object pointer to avoid crash.
   Changed option name _FS_SHARE to _FS_LOCK.
 
+
 R0.09 (September 6, 2011)
   f_mkfs() supports multiple partition on a physical drive.
   Added f_fdisk(). (_MULTI_PARTITION = 2)
 
+
 R0.08b (January 15, 2011)
   Fast seek function is also applied to f_read() and f_write().
   f_lseek() reports required table size on creating CLMP.
   Extended format syntax of f_printf().
   Ignores duplicated directory separators in given path names.
 
+
 R0.08a (August 16, 2010)
   Added f_getcwd(). (_FS_RPATH = 2)
   Added sector erase function. (_USE_ERASE)
@@ -135,6 +159,7 @@ R0.08a (August 16, 2010)
   Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'.
   Fixed f_mkfs() creates wrong FAT32 volume.
 
+
 R0.08 (May 15, 2010)
   Added a memory configuration option. (_USE_LFN)
   Added support of file lock. (_FS_SHARE)
@@ -143,6 +168,7 @@ R0.08 (May 15, 2010)
   Changed fname member in the FILINFO structure on Unicode cfg.
   String functions support UTF-8 encoding files on Unicode cfg.
 
+
 R0.07e (November 3, 2009)
   Separated out configuration options from ff.h to ffconf.h.
   Added a configuration option, _LFN_UNICODE.
@@ -150,6 +176,7 @@ R0.07e (November 3, 2009)
   Fixed name matching error on the 13 char boundary.
   Changed f_readdir() to return the SFN with always upper case on non-LFN cfg.
 
+
 R0.07c (Junuary 21, 2009)
   Fixed f_unlink() may return FR_OK on error.
   Fixed wrong cache control in f_lseek().
@@ -158,10 +185,12 @@ R0.07c (Junuary 21, 2009)
   Added f_chdrive().
   Added proper case conversion to extended characters.
 
+
 R0.07a (April 14, 2009)
   Separated out OS dependent code on re-entrant configuration.
   Added multiple sector size support.
 
+
 R0.07 (April 1, 2009)
   Merged Tiny-FatFs into FatFs as a buffer configuration option.
   Added long file name support.
@@ -172,11 +201,13 @@ R0.07 (April 1, 2009)
   Changed result code of critical errors.
   Renamed string functions to avoid name collision.
 
+
 R0.06 (April 1, 2008)
   Added f_forward. (Tiny-FatFs)
   Added string functions: fgets, fputc, fputs and fprintf.
   Improved performance of f_lseek on moving to the same or following cluster.
 
+
 R0.05a (February 3, 2008)
   Added f_truncate.
   Added f_utime.
@@ -184,12 +215,14 @@ R0.05a (February 3, 2008)
   Fixed btr in f_read can be mistruncated.
   Fixed cached sector is left not flushed when create and close without write.
 
+
 R0.05 (August 26, 2007)
   Changed arguments of f_read, f_write.
   Changed arguments of f_mkfs. (FatFs)
   Fixed f_mkfs on FAT32 creates incorrect FSInfo. (FatFs)
   Fixed f_mkdir on FAT32 creates incorrect directory. (FatFs)
 
+
 R0.04b (May 5, 2007)
   Added _USE_NTFLAG option.
   Added FSInfo support.
@@ -197,6 +230,7 @@ R0.04b (May 5, 2007)
   Fixed DBCS name can result FR_INVALID_NAME.
   Fixed short seek (<= csize) collapses the file object.
 
+
 R0.04a (April 1, 2007)
   Supported multiple partitions on a plysical drive. (FatFs)
   Added minimization level 3.
@@ -204,31 +238,38 @@ R0.04a (April 1, 2007)
   Fixed an endian sensitive code in f_mkfs. (FatFs)
   Fixed a problem corresponds to FAT32 support. (Tiny-FatFs)
 
+
 R0.04 (February 4, 2007)
   Supported multiple drive system. (FatFs)
   Changed some APIs for multiple drive system.
   Added f_mkfs. (FatFs)
   Added _USE_FAT32 option. (Tiny-FatFs)
 
+
 R0.03a (December 11, 2006)
   Improved cluster scan algolithm to write files fast.
   Fixed f_mkdir creates incorrect directory on FAT32.
 
+
 R0.03 (September 22, 2006)
   Added f_rename.
   Changed option _FS_MINIMUM to _FS_MINIMIZE.
 
+
 R0.02a (June 10, 2006)
   Added a configuration option _FS_MINIMUM.
 
+
 R0.02 (Jun 01, 2006)
   Added FAT12.
   Removed unbuffered mode.
   Fixed a problem on small (<32M) patition.
 
+
 R0.01 (April 29, 2006)
   First release
 
+
 R0.00 (February 26, 2006)
   Prototype (not released)
 
diff --git a/source/00history.txt b/source/00history.txt
index cb8753b..f3032e4 100644
--- a/source/00history.txt
+++ b/source/00history.txt
@@ -338,3 +338,9 @@ R0.14 (October 14, 2019)
   Fixed f_readdir() function returns file names with wrong case conversion. (appeared at R0.12)
   Fixed f_mkfs() function can fail to create exFAT volume in the second partition. (appeared at R0.12)
 
+
+R0.14a (December 5, 2020)
+  Limited number of recursive calls in f_findnext().
+  Fixed old floppy disks formatted with MS-DOS 2.x and 3.x cannot be mounted.
+  Fixed some compiler warnings.
+
diff --git a/source/00readme.txt b/source/00readme.txt
index 234c675..1293b66 100644
--- a/source/00readme.txt
+++ b/source/00readme.txt
@@ -1,4 +1,4 @@
-FatFs Module Source Files R0.14
+FatFs Module Source Files R0.14a
 
 
 FILES
diff --git a/source/diskio.c b/source/diskio.c
index 27f1331..179e387 100644
--- a/source/diskio.c
+++ b/source/diskio.c
@@ -1,5 +1,5 @@
 /*-----------------------------------------------------------------------*/
-/* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2019        */
+/* Low level disk I/O module SKELETON for FatFs     (C)ChaN, 2019        */
 /*-----------------------------------------------------------------------*/
 /* If a working storage control module is available, it should be        */
 /* attached to the FatFs via a glue function rather than modifying it.   */
diff --git a/source/ff.c b/source/ff.c
index b8ac2e3..9b980d7 100644
--- a/source/ff.c
+++ b/source/ff.c
@@ -1,8 +1,8 @@
 /*----------------------------------------------------------------------------/
-/  FatFs - Generic FAT Filesystem Module  R0.14                               /
+/  FatFs - Generic FAT Filesystem Module  R0.14a                              /
 /-----------------------------------------------------------------------------/
 /
-/ Copyright (C) 2019, ChaN, all right reserved.
+/ Copyright (C) 2020, ChaN, all right reserved.
 /
 / FatFs module is an open source software. Redistribution and use of FatFs in
 / source and binary forms, with or without modification, are permitted provided
@@ -29,7 +29,7 @@
 
 ---------------------------------------------------------------------------*/
 
-#if FF_DEFINED != 86606	/* Revision ID */
+#if FF_DEFINED != 80196	/* Revision ID */
 #error Wrong include file (ff.h).
 #endif
 
@@ -1134,13 +1134,12 @@ static FRESULT sync_fs (	/* Returns FR_OK or FR_DISK_ERR */
 		if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {	/* FAT32: Update FSInfo sector if needed */
 			/* Create FSInfo structure */
 			mem_set(fs->win, 0, sizeof fs->win);
-			st_word(fs->win + BS_55AA, 0xAA55);
-			st_dword(fs->win + FSI_LeadSig, 0x41615252);
-			st_dword(fs->win + FSI_StrucSig, 0x61417272);
-			st_dword(fs->win + FSI_Free_Count, fs->free_clst);
-			st_dword(fs->win + FSI_Nxt_Free, fs->last_clst);
-			/* Write it into the FSInfo sector */
-			fs->winsect = fs->volbase + 1;
+			st_word(fs->win + BS_55AA, 0xAA55);					/* Boot signature */
+			st_dword(fs->win + FSI_LeadSig, 0x41615252);		/* Leading signature */
+			st_dword(fs->win + FSI_StrucSig, 0x61417272);		/* Structure signature */
+			st_dword(fs->win + FSI_Free_Count, fs->free_clst);	/* Number of free clusters */
+			st_dword(fs->win + FSI_Nxt_Free, fs->last_clst);	/* Last allocated culuster */
+			fs->winsect = fs->volbase + 1;						/* Write it into the FSInfo sector (Next to VBR) */
 			disk_write(fs->pdrv, fs->win, fs->winsect, 1);
 			fs->fsi_flag = 0;
 		}
@@ -1235,7 +1234,8 @@ static DWORD get_fat (		/* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFF
 					break;
 				}
 			}
-			/* go to default */
+			val = 1;	/* Internal error */
+			break;
 #endif
 		default:
 			val = 1;	/* Internal error */
@@ -1266,7 +1266,7 @@ static FRESULT put_fat (	/* FR_OK(0):succeeded, !=0:error */
 
 	if (clst >= 2 && clst < fs->n_fatent) {	/* Check if in valid range */
 		switch (fs->fs_type) {
-		case FS_FAT12 :
+		case FS_FAT12:
 			bc = (UINT)clst; bc += bc / 2;	/* bc: byte offset of the entry */
 			res = move_window(fs, fs->fatbase + (bc / SS(fs)));
 			if (res != FR_OK) break;
@@ -1280,16 +1280,16 @@ static FRESULT put_fat (	/* FR_OK(0):succeeded, !=0:error */
 			fs->wflag = 1;
 			break;
 
-		case FS_FAT16 :
+		case FS_FAT16:
 			res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
 			if (res != FR_OK) break;
 			st_word(fs->win + clst * 2 % SS(fs), (WORD)val);	/* Simple WORD array */
 			fs->wflag = 1;
 			break;
 
-		case FS_FAT32 :
+		case FS_FAT32:
 #if FF_FS_EXFAT
-		case FS_EXFAT :
+		case FS_EXFAT:
 #endif
 			res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
 			if (res != FR_OK) break;
@@ -1821,7 +1821,7 @@ static FRESULT dir_next (	/* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DEN
 
 static FRESULT dir_alloc (	/* FR_OK(0):succeeded, !=0:error */
 	DIR* dp,				/* Pointer to the directory object */
-	UINT nent				/* Number of contiguous entries to allocate */
+	UINT n_ent				/* Number of contiguous entries to allocate */
 )
 {
 	FRESULT res;
@@ -1836,16 +1836,16 @@ static FRESULT dir_alloc (	/* FR_OK(0):succeeded, !=0:error */
 			res = move_window(fs, dp->sect);
 			if (res != FR_OK) break;
 #if FF_FS_EXFAT
-			if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) {
+			if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) {	/* Is the entry free? */
 #else
-			if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) {
+			if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) {	/* Is the entry free? */
 #endif
-				if (++n == nent) break;	/* A block of contiguous free entries is found */
+				if (++n == n_ent) break;	/* Is a block of contiguous free entries found? */
 			} else {
-				n = 0;					/* Not a blank entry. Restart to search */
+				n = 0;				/* Not a free entry, restart to search */
 			}
-			res = dir_next(dp, 1);
-		} while (res == FR_OK);	/* Next entry with table stretch enabled */
+			res = dir_next(dp, 1);	/* Next entry with table stretch enabled */
+		} while (res == FR_OK);
 	}
 
 	if (res == FR_NO_FILE) res = FR_DENIED;	/* No directory entry to allocate */
@@ -2527,19 +2527,19 @@ static FRESULT dir_register (	/* FR_OK:succeeded, FR_DENIED:no free entry or too
 	FRESULT res;
 	FATFS *fs = dp->obj.fs;
 #if FF_USE_LFN		/* LFN configuration */
-	UINT n, nlen, nent;
+	UINT n, len, n_ent;
 	BYTE sn[12], sum;
 
 
 	if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME;	/* Check name validity */
-	for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ;	/* Get lfn length */
+	for (len = 0; fs->lfnbuf[len]; len++) ;	/* Get lfn length */
 
 #if FF_FS_EXFAT
 	if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */
-		nent = (nlen + 14) / 15 + 2;	/* Number of entries to allocate (85+C0+C1s) */
-		res = dir_alloc(dp, nent);		/* Allocate directory entries */
+		n_ent = (len + 14) / 15 + 2;	/* Number of entries to allocate (85+C0+C1s) */
+		res = dir_alloc(dp, n_ent);		/* Allocate directory entries */
 		if (res != FR_OK) return res;
-		dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1);	/* Set the allocated entry block offset */
+		dp->blk_ofs = dp->dptr - SZDIRE * (n_ent - 1);	/* Set the allocated entry block offset */
 
 		if (dp->obj.stat & 4) {			/* Has the directory been stretched by new allocation? */
 			dp->obj.stat &= ~4;
@@ -2580,19 +2580,19 @@ static FRESULT dir_register (	/* FR_OK:succeeded, FR_DENIED:no free entry or too
 	}
 
 	/* Create an SFN with/without LFNs. */
-	nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1;	/* Number of entries to allocate */
-	res = dir_alloc(dp, nent);		/* Allocate entries */
-	if (res == FR_OK && --nent) {	/* Set LFN entry if needed */
-		res = dir_sdi(dp, dp->dptr - nent * SZDIRE);
+	n_ent = (sn[NSFLAG] & NS_LFN) ? (len + 12) / 13 + 1 : 1;	/* Number of entries to allocate */
+	res = dir_alloc(dp, n_ent);		/* Allocate entries */
+	if (res == FR_OK && --n_ent) {	/* Set LFN entry if needed */
+		res = dir_sdi(dp, dp->dptr - n_ent * SZDIRE);
 		if (res == FR_OK) {
 			sum = sum_sfn(dp->fn);	/* Checksum value of the SFN tied to the LFN */
 			do {					/* Store LFN entries in bottom first */
 				res = move_window(fs, dp->sect);
 				if (res != FR_OK) break;
-				put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum);
+				put_lfn(fs->lfnbuf, dp->dir, (BYTE)n_ent, sum);
 				fs->wflag = 1;
 				res = dir_next(dp, 0);	/* Next entry */
-			} while (res == FR_OK && --nent);
+			} while (res == FR_OK && --n_ent);
 		}
 	}
 
@@ -2778,7 +2778,10 @@ static void get_fileinfo (
 /* Pattern matching                                                      */
 /*-----------------------------------------------------------------------*/
 
-static DWORD get_achar (	/* Get a character and advances ptr */
+#define FIND_RECURS	4	/* Maximum number of wildcard terms in the pattern to limit recursion */
+
+
+static DWORD get_achar (	/* Get a character and advance ptr */
 	const TCHAR** ptr		/* Pointer to pointer to the ANSI/OEM or Unicode string */
 )
 {
@@ -2809,41 +2812,43 @@ static DWORD get_achar (	/* Get a character and advances ptr */
 }
 
 
-static int pattern_matching (	/* 0:not matched, 1:matched */
+static int pattern_match (	/* 0:mismatched, 1:matched */
 	const TCHAR* pat,	/* Matching pattern */
 	const TCHAR* nam,	/* String to be tested */
-	int skip,			/* Number of pre-skip chars (number of ?s) */
-	int inf				/* Infinite search (* specified) */
+	UINT skip,			/* Number of pre-skip chars (number of ?s, b8:infinite (* specified)) */
+	UINT recur			/* Recursion count */
 )
 {
-	const TCHAR *pp, *np;
-	DWORD pc, nc;
-	int nm, nx;
+	const TCHAR *pptr, *nptr;
+	DWORD pchr, nchr;
+	UINT sk;
 
 
-	while (skip--) {				/* Pre-skip name chars */
+	while ((skip & 0xFF) != 0) {		/* Pre-skip name chars */
 		if (!get_achar(&nam)) return 0;	/* Branch mismatched if less name chars */
+		skip--;
 	}
-	if (*pat == 0 && inf) return 1;	/* (short circuit) */
+	if (*pat == 0 && skip) return 1;	/* Matched? (short circuit) */
 
 	do {
-		pp = pat; np = nam;			/* Top of pattern and name to match */
+		pptr = pat; nptr = nam;			/* Top of pattern and name to match */
 		for (;;) {
-			if (*pp == '?' || *pp == '*') {	/* Wildcard? */
-				nm = nx = 0;
-				do {				/* Analyze the wildcard block */
-					if (*pp++ == '?') nm++; else nx = 1;
-				} while (*pp == '?' || *pp == '*');
-				if (pattern_matching(pp, np, nm, nx)) return 1;	/* Test new branch (recurs upto number of wildcard blocks in the pattern) */
-				nc = *np; break;	/* Branch mismatched */
+			if (*pptr == '?' || *pptr == '*') {	/* Wildcard term? */
+				if (recur == 0) return 0;	/* Too many wildcard terms? */
+				sk = 0;
+				do {	/* Analyze the wildcard term */
+					if (*pptr++ == '?') sk++; else sk |= 0x100;
+				} while (*pptr == '?' || *pptr == '*');
+				if (pattern_match(pptr, nptr, sk, recur - 1)) return 1;	/* Test new branch (recursive call) */
+				nchr = *nptr; break;	/* Branch mismatched */
 			}
-			pc = get_achar(&pp);	/* Get a pattern char */
-			nc = get_achar(&np);	/* Get a name char */
-			if (pc != nc) break;	/* Branch mismatched? */
-			if (pc == 0) return 1;	/* Branch matched? (matched at end of both strings) */
+			pchr = get_achar(&pptr);	/* Get a pattern char */
+			nchr = get_achar(&nptr);	/* Get a name char */
+			if (pchr != nchr) break;	/* Branch mismatched? */
+			if (pchr == 0) return 1;	/* Branch matched? (matched at end of both strings) */
 		}
 		get_achar(&nam);			/* nam++ */
-	} while (inf && nc);			/* Retry until end of name if infinite search is specified */
+	} while (skip && nchr);		/* Retry until end of name if infinite search is specified */
 
 	return 0;
 }
@@ -3290,23 +3295,37 @@ static DWORD make_rand (
 
 /* Check what the sector is */
 
-static UINT check_fs (	/* 0:FAT VBR, 1:exFAT VBR, 2:Valid BS but not FAT, 3:Invalid BS, 4:Disk error */
+static UINT check_fs (	/* 0:FAT VBR, 1:exFAT VBR, 2:Not FAT and valid BS, 3:Not FAT and invalid BS, 4:Disk error */
 	FATFS* fs,			/* Filesystem object */
 	LBA_t sect			/* Sector to load and check if it is an FAT-VBR or not */
 )
 {
+	WORD w, sign;
+	BYTE b;
+
+
 	fs->wflag = 0; fs->winsect = (LBA_t)0 - 1;		/* Invaidate window */
 	if (move_window(fs, sect) != FR_OK) return 4;	/* Load the boot sector */
-
-	if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3;	/* Check boot signature (always here regardless of the sector size) */
-
-	if (FF_FS_EXFAT && !mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT   ", 11)) return 1;	/* Check if exFAT VBR */
-
-	if (fs->win[BS_JmpBoot] == 0xE9 || fs->win[BS_JmpBoot] == 0xEB || fs->win[BS_JmpBoot] == 0xE8) {	/* Valid JumpBoot code? */
-		if (!mem_cmp(fs->win + BS_FilSysType, "FAT", 3)) return 0;		/* Is it an FAT VBR? */
-		if (!mem_cmp(fs->win + BS_FilSysType32, "FAT32", 5)) return 0;	/* Is it an FAT32 VBR? */
+	sign = ld_word(fs->win + BS_55AA);
+#if FF_FS_EXFAT
+	if (sign == 0xAA55 && !mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT   ", 11)) return 1;	/* It is an exFAT VBR */
+#endif
+	b = fs->win[BS_JmpBoot];
+	if (b == 0xEB || b == 0xE9 || b == 0xE8) {	/* Valid JumpBoot code? (short jump, near jump or near call) */
+		if (sign == 0xAA55 && !mem_cmp(fs->win + BS_FilSysType32, "FAT32   ", 8)) return 0;	/* It is an FAT32 VBR */
+		/* FAT volumes formatted with early MS-DOS lack boot signature and FAT string, so that we need to identify the FAT VBR without them. */
+		w = ld_word(fs->win + BPB_BytsPerSec);
+		if ((w & (w - 1)) == 0 && w >= FF_MIN_SS && w <= FF_MAX_SS) {	/* Properness of sector size */
+			b = fs->win[BPB_SecPerClus];
+			if (b != 0 && (b & (b - 1)) == 0						/* Properness of cluster size */
+			&& (fs->win[BPB_NumFATs] == 1 || fs->win[BPB_NumFATs] == 2)	/* Properness of number of FATs */
+			&& ld_word(fs->win + BPB_RootEntCnt) != 0				/* Properness of root entry count */
+			&& ld_word(fs->win + BPB_FATSz16) != 0) {				/* Properness of FAT size */
+				return 0;	/* Sector can be presumed an FAT VBR */
+			}
+		}
 	}
-	return 2;	/* Valid BS but not FAT */
+	return sign == 0xAA55 ? 2 : 3;	/* Not an FAT VBR (valid or invalid BS) */
 }
 
 
@@ -3698,7 +3717,7 @@ FRESULT f_open (
 	DIR dj;
 	FATFS *fs;
 #if !FF_FS_READONLY
-	DWORD cl, bcs, clst;
+	DWORD cl, bcs, clst,  tm;
 	LBA_t sc;
 	FSIZE_t ofs;
 #endif
@@ -3765,8 +3784,10 @@ FRESULT f_open (
 #endif
 				{
 					/* Set directory entry initial state */
+					tm = GET_FATTIME();					/* Set created time */
+					st_dword(dj.dir + DIR_CrtTime, tm);
+					st_dword(dj.dir + DIR_ModTime, tm);
 					cl = ld_clust(fs, dj.dir);			/* Get current cluster chain */
-					st_dword(dj.dir + DIR_CrtTime, GET_FATTIME());	/* Set created time */
 					dj.dir[DIR_Attr] = AM_ARC;			/* Reset attribute */
 					st_clust(fs, dj.dir, 0);			/* Reset file allocation info */
 					st_dword(dj.dir + DIR_FileSize, 0);
@@ -4705,9 +4726,9 @@ FRESULT f_findnext (
 	for (;;) {
 		res = f_readdir(dp, fno);		/* Get a directory item */
 		if (res != FR_OK || !fno || !fno->fname[0]) break;	/* Terminate if any error or end of directory */
-		if (pattern_matching(dp->pat, fno->fname, 0, 0)) break;		/* Test for the file name */
+		if (pattern_match(dp->pat, fno->fname, 0, FIND_RECURS)) break;		/* Test for the file name */
 #if FF_USE_LFN && FF_USE_FIND == 2
-		if (pattern_matching(dp->pat, fno->altname, 0, 0)) break;	/* Test for alternative name if exist */
+		if (pattern_match(dp->pat, fno->altname, 0, FIND_RECURS)) break;	/* Test for alternative name if exist */
 #endif
 	}
 	return res;
@@ -5376,10 +5397,12 @@ FRESULT f_getlabel (
 		if (res == FR_OK) {
 			switch (fs->fs_type) {
 			case FS_EXFAT:
-				di = BPB_VolIDEx; break;
+				di = BPB_VolIDEx;
+				break;
 
 			case FS_FAT32:
-				di = BS_VolID32; break;
+				di = BS_VolID32;
+				break;
 
 			default:
 				di = BS_VolID;
@@ -5677,7 +5700,7 @@ FRESULT f_forward (
 
 #if !FF_FS_READONLY && FF_USE_MKFS
 /*-----------------------------------------------------------------------*/
-/* Create an FAT/exFAT volume                                            */
+/* Create FAT/exFAT volume                                               */
 /*-----------------------------------------------------------------------*/
 
 #define N_SEC_TRACK 63			/* Sectors per track for determination of drive CHS */
@@ -5685,12 +5708,12 @@ FRESULT f_forward (
 #define GPT_ITEMS	128			/* Number of GPT table size (>=128, sector aligned) */
 
 
-/* Create partitions on the physical drive */
+/* Create partitions on the physical drive in format of MBR or GPT */
 
 static FRESULT create_partition (
 	BYTE drv,			/* Physical drive number */
 	const LBA_t plst[],	/* Partition list */
-	UINT sys,			/* System ID (for only MBR, temp setting) and bit8:GPT */
+	BYTE sys,			/* System ID (for only MBR, temp setting) */
 	BYTE* buf			/* Working buffer for a sector */
 )
 {
@@ -5801,7 +5824,7 @@ static FRESULT create_partition (
 
 			st_dword(pte + PTE_StLba, s_lba32);		/* Start LBA */
 			st_dword(pte + PTE_SizLba, n_lba32);	/* Number of sectors */
-			pte[PTE_System] = (BYTE)sys;			/* System type */
+			pte[PTE_System] = sys;					/* System type */
 
 			cy = (UINT)(s_lba32 / n_sc / n_hd);		/* Start cylinder */
 			hd = (BYTE)(s_lba32 / n_sc % n_hd);		/* Start head */
@@ -5966,10 +5989,9 @@ FRESULT f_mkfs (
 
 #if FF_FS_EXFAT
 	if (fsty == FS_EXFAT) {	/* Create an exFAT volume */
-		DWORD szb_bit, szb_case, sum, nb, cl, tbl[3];
+		DWORD szb_bit, szb_case, sum, nbit, clu, clen[3];
 		WCHAR ch, si;
 		UINT j, st;
-		BYTE b;
 
 		if (sz_vol < 0x1000) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Too small volume for exFAT? */
 #if FF_USE_TRIM
@@ -5990,12 +6012,12 @@ FRESULT f_mkfs (
 		if (n_clst <16) LEAVE_MKFS(FR_MKFS_ABORTED);			/* Too few clusters? */
 		if (n_clst > MAX_EXFAT) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Too many clusters? */
 
-		szb_bit = (n_clst + 7) / 8;							/* Size of allocation bitmap */
-		tbl[0] = (szb_bit + sz_au * ss - 1) / (sz_au * ss);	/* Number of allocation bitmap clusters */
+		szb_bit = (n_clst + 7) / 8;								/* Size of allocation bitmap */
+		clen[0] = (szb_bit + sz_au * ss - 1) / (sz_au * ss);	/* Number of allocation bitmap clusters */
 
 		/* Create a compressed up-case table */
-		sect = b_data + sz_au * tbl[0];	/* Table start sector */
-		sum = 0;						/* Table checksum to be stored in the 82 entry */
+		sect = b_data + sz_au * clen[0];	/* Table start sector */
+		sum = 0;							/* Table checksum to be stored in the 82 entry */
 		st = 0; si = 0; i = 0; j = 0; szb_case = 0;
 		do {
 			switch (st) {
@@ -6006,10 +6028,10 @@ FRESULT f_mkfs (
 				}
 				for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ;	/* Get run length of no-case block */
 				if (j >= 128) {
-					ch = 0xFFFF; st = 2; break;	/* Compress the no-case block if run is >= 128 */
+					ch = 0xFFFF; st = 2; break;	/* Compress the no-case block if run is >= 128 chars */
 				}
 				st = 1;			/* Do not compress short run */
-				/* go to next case */
+				/* FALLTHROUGH */
 			case 1:
 				ch = si++;		/* Fill the short run */
 				if (--j == 0) st = 0;
@@ -6028,16 +6050,15 @@ FRESULT f_mkfs (
 				sect += n; i = 0;
 			}
 		} while (si);
-		tbl[1] = (szb_case + sz_au * ss - 1) / (sz_au * ss);	/* Number of up-case table clusters */
-		tbl[2] = 1;										/* Number of root dir clusters */
+		clen[1] = (szb_case + sz_au * ss - 1) / (sz_au * ss);	/* Number of up-case table clusters */
+		clen[2] = 1;	/* Number of root dir clusters */
 
 		/* Initialize the allocation bitmap */
-		sect = b_data; nsect = (szb_bit + ss - 1) / ss;	/* Start of bitmap and number of sectors */
-		nb = tbl[0] + tbl[1] + tbl[2];					/* Number of clusters in-use by system */
+		sect = b_data; nsect = (szb_bit + ss - 1) / ss;	/* Start of bitmap and number of bitmap sectors */
+		nbit = clen[0] + clen[1] + clen[2];				/* Number of clusters in-use by system (bitmap, up-case and root-dir) */
 		do {
-			mem_set(buf, 0, sz_buf * ss);
-			for (i = 0; nb >= 8 && i < sz_buf * ss; buf[i++] = 0xFF, nb -= 8) ;
-			for (b = 1; nb != 0 && i < sz_buf * ss; buf[i] |= b, b <<= 1, nb--) ;
+			mem_set(buf, 0, sz_buf * ss);				/* Initialize bitmap buffer */
+			for (i = 0; nbit != 0 && i / 8 < sz_buf * ss; buf[i / 8] |= 1 << (i % 8), i++, nbit--) ;	/* Mark used clusters */
 			n = (nsect > sz_buf) ? sz_buf : nsect;		/* Write the buffered data */
 			if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
 			sect += n; nsect -= n;
@@ -6045,20 +6066,20 @@ FRESULT f_mkfs (
 
 		/* Initialize the FAT */
 		sect = b_fat; nsect = sz_fat;	/* Start of FAT and number of FAT sectors */
-		j = nb = cl = 0;
+		j = nbit = clu = 0;
 		do {
-			mem_set(buf, 0, sz_buf * ss); i = 0;	/* Clear work area and reset write index */
-			if (cl == 0) {	/* Set FAT [0] and FAT[1] */
-				st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++;
-				st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++;
+			mem_set(buf, 0, sz_buf * ss); i = 0;	/* Clear work area and reset write offset */
+			if (clu == 0) {	/* Initialize FAT [0] and FAT[1] */
+				st_dword(buf + i, 0xFFFFFFF8); i += 4; clu++;
+				st_dword(buf + i, 0xFFFFFFFF); i += 4; clu++;
 			}
 			do {			/* Create chains of bitmap, up-case and root dir */
-				while (nb != 0 && i < sz_buf * ss) {	/* Create a chain */
-					st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF);
-					i += 4; cl++; nb--;
+				while (nbit != 0 && i < sz_buf * ss) {	/* Create a chain */
+					st_dword(buf + i, (nbit > 1) ? clu + 1 : 0xFFFFFFFF);
+					i += 4; clu++; nbit--;
 				}
-				if (nb == 0 && j < 3) nb = tbl[j++];	/* Next chain */
-			} while (nb != 0 && i < sz_buf * ss);
+				if (nbit == 0 && j < 3) nbit = clen[j++];	/* Get next chain length */
+			} while (nbit != 0 && i < sz_buf * ss);
 			n = (nsect > sz_buf) ? sz_buf : nsect;	/* Write the buffered data */
 			if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
 			sect += n; nsect -= n;
@@ -6072,13 +6093,13 @@ FRESULT f_mkfs (
 		st_dword(buf + SZDIRE * 1 + 24, szb_bit);			/*  size */
 		buf[SZDIRE * 2 + 0] = ET_UPCASE;					/* Up-case table entry */
 		st_dword(buf + SZDIRE * 2 + 4, sum);				/*  sum */
-		st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]);		/*  cluster */
+		st_dword(buf + SZDIRE * 2 + 20, 2 + clen[0]);		/*  cluster */
 		st_dword(buf + SZDIRE * 2 + 24, szb_case);			/*  size */
-		sect = b_data + sz_au * (tbl[0] + tbl[1]); nsect = sz_au;	/* Start of the root directory and number of sectors */
+		sect = b_data + sz_au * (clen[0] + clen[1]); nsect = sz_au;	/* Start of the root directory and number of sectors */
 		do {	/* Fill root directory sectors */
 			n = (nsect > sz_buf) ? sz_buf : nsect;
 			if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
-			mem_set(buf, 0, ss);
+			mem_set(buf, 0, ss);	/* Rest of entries are filled with zero */
 			sect += n; nsect -= n;
 		} while (nsect);
 
@@ -6094,7 +6115,7 @@ FRESULT f_mkfs (
 			st_dword(buf + BPB_FatSzEx, sz_fat);					/* FAT size [sector] */
 			st_dword(buf + BPB_DataOfsEx, (DWORD)(b_data - b_vol));	/* Data offset [sector] */
 			st_dword(buf + BPB_NumClusEx, n_clst);					/* Number of clusters */
-			st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]);	/* Root dir cluster # */
+			st_dword(buf + BPB_RootClusEx, 2 + clen[0] + clen[1]);	/* Root dir cluster # */
 			st_dword(buf + BPB_VolIDEx, GET_FATTIME());				/* VSN */
 			st_word(buf + BPB_FSVerEx, 0x100);						/* Filesystem version (1.00) */
 			for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ;	/* Log2 of sector size [byte] */
@@ -6520,7 +6541,7 @@ static void putc_bfd (putbuff* pb, TCHAR c)
 	WCHAR hs, wc;
 #if FF_LFN_UNICODE == 2
 	DWORD dc;
-	TCHAR *tp;
+	const TCHAR *tp;
 #endif
 #endif
 
@@ -6562,7 +6583,7 @@ static void putc_bfd (putbuff* pb, TCHAR c)
 			return;
 		}
 	}
-	tp = (TCHAR*)pb->bs;
+	tp = (const TCHAR*)pb->bs;
 	dc = tchar2uni(&tp);	/* UTF-8 ==> UTF-16 */
 	if (dc == 0xFFFFFFFF) return;	/* Wrong code? */
 	wc = (WCHAR)dc;
@@ -6650,7 +6671,7 @@ static int putc_flush (putbuff* pb)
 	if (   pb->idx >= 0	/* Flush buffered characters to the file */
 		&& f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK
 		&& (UINT)pb->idx == nw) return pb->nchr;
-	return EOF;
+	return -1;
 }
 
 
@@ -6754,7 +6775,7 @@ int f_printf (
 		d = c;
 		if (IsLower(d)) d -= 0x20;
 		switch (d) {				/* Atgument type is... */
-		case 'S' :					/* String */
+		case 'S':					/* String */
 			p = va_arg(arp, TCHAR*);
 			for (j = 0; p[j]; j++) ;
 			if (!(f & 2)) {						/* Right padded */
@@ -6764,21 +6785,26 @@ int f_printf (
 			while (j++ < w) putc_bfd(&pb, ' ') ;	/* Left padded */
 			continue;
 
-		case 'C' :					/* Character */
-			putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;
+		case 'C':					/* Character */
+			putc_bfd(&pb, (TCHAR)va_arg(arp, int));
+			continue;
 
-		case 'B' :					/* Unsigned binary */
-			r = 2; break;
+		case 'B':					/* Unsigned binary */
+			r = 2;
+			break;
 
-		case 'O' :					/* Unsigned octal */
-			r = 8; break;
+		case 'O':					/* Unsigned octal */
+			r = 8; 
+			break;
 
-		case 'D' :					/* Signed decimal */
-		case 'U' :					/* Unsigned decimal */
-			r = 10; break;
+		case 'D':					/* Signed decimal */
+		case 'U':					/* Unsigned decimal */
+			r = 10;
+			break;
 
-		case 'X' :					/* Unsigned hexdecimal */
-			r = 16; break;
+		case 'X':					/* Unsigned hexdecimal */
+			r = 16;
+			break;
 
 		default:					/* Unknown type (pass-through) */
 			putc_bfd(&pb, c); continue;
diff --git a/source/ff.h b/source/ff.h
index 5225041..ec9c91e 100644
--- a/source/ff.h
+++ b/source/ff.h
@@ -1,8 +1,8 @@
 /*----------------------------------------------------------------------------/
-/  FatFs - Generic FAT Filesystem module  R0.14                               /
+/  FatFs - Generic FAT Filesystem module  R0.14a                              /
 /-----------------------------------------------------------------------------/
 /
-/ Copyright (C) 2019, ChaN, all right reserved.
+/ Copyright (C) 2020, ChaN, all right reserved.
 /
 / FatFs module is an open source software. Redistribution and use of FatFs in
 / source and binary forms, with or without modification, are permitted provided
@@ -20,7 +20,7 @@
 
 
 #ifndef FF_DEFINED
-#define FF_DEFINED	86606	/* Revision ID */
+#define FF_DEFINED	80196	/* Revision ID */
 
 #ifdef __cplusplus
 extern "C" {
@@ -345,10 +345,6 @@ TCHAR* f_gets (TCHAR* buff, int len, FIL* fp);						/* Get a string from the fil
 #define f_rmdir(path) f_unlink(path)
 #define f_unmount(path) f_mount(0, path, 0)
 
-#ifndef EOF
-#define EOF (-1)
-#endif
-
 
 
 
diff --git a/source/ffconf.h b/source/ffconf.h
index bdbe320..e6beccb 100644
--- a/source/ffconf.h
+++ b/source/ffconf.h
@@ -2,7 +2,7 @@
 /  FatFs Functional Configurations
 /---------------------------------------------------------------------------*/
 
-#define FFCONF_DEF	86606	/* Revision ID */
+#define FFCONF_DEF	80196	/* Revision ID */
 
 /*---------------------------------------------------------------------------/
 / Function Configurations
@@ -205,8 +205,8 @@
 /  To enable the 64-bit LBA, also exFAT needs to be enabled. (FF_FS_EXFAT == 1) */
 
 
-#define FF_MIN_GPT		0x100000000
-/* Minimum number of sectors to switch GPT format to create partition in f_mkfs and
+#define FF_MIN_GPT		0x10000000
+/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs and
 /  f_fdisk function. 0x100000000 max. This option has no effect when FF_LBA64 == 0. */
 
 
@@ -237,7 +237,7 @@
 #define FF_FS_NORTC		0
 #define FF_NORTC_MON	1
 #define FF_NORTC_MDAY	1
-#define FF_NORTC_YEAR	2019
+#define FF_NORTC_YEAR	2020
 /* The option FF_FS_NORTC switches timestamp functiton. If the system does not have
 /  any RTC function or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable
 /  the timestamp function. Every object modified by FatFs will have a fixed timestamp