Hi,
This error message is not relative to the FileStorage class.
What file are you uploading ?
Is the file extension be added into the security configuration file ?
for example , the config file specify this :
<security name="ImageFilters">
<item>.jpg</item>
<item>.jpeg</item>
<item>.gif</item>
<item>.png</item>
</security>
Do you get problem when upload this kinds of file ?
Regards,
Terry