FatFs module can swich the exFAT on/off by configuration option. When enable the exFAT on the commercial products, you will need to be licensed by Microsoft depends on the final destination of the products.</p>
<p><em>Remark: Enabling exFAT discards ANSI C (C89) compatibility because of need for 64-bit integer type.</em></p>
</div>

<div class="para doc" id="reentrant">
<h3>Re-entrancy</h3>
<p>The file operations to the <em>different volume</em> each other is always re-entrant regardless of configurations e