1. Use input type "file".

2. Put just the input name in the <FILE> config (no need to use :POST;).

<div>%notify%</div>
<p>Upload file:</p>
<input type="file" name="upload" /><br/>
<input type="submit" value="Upload" />


<FILE>upload</FILE>
<MAXSIZE>100</MAXSIZE>
<TYPE>png,jpg,webp,mp3,mp4</TYPE>
<NAME>Uploaded File</NAME>
<DIR>51975</DIR>