Ruuttu

You can enable BuddyPress groups to have their own private little file repositories. Files can 
be uploaded and downloaded and that’s it. There’s no tagging, searching or even pagination.

BuddyPress Group Folders

Very basic and private file storage for groups.

wycks

Will add a little “x” next to any files/folders set to 777, since this is inherently insecure. Checks all recursive folders that come with a default WordPress install.
This plugin can be CPU intensive as it iterates over your whole folder/file structure to gather statistics.
Notes :
<ul>
<li>Checks root, wp-admin, wp-content, wp-includes and all sub folders</li>
<li>Includes your plugin and theme folders</li>
<li>Ignores images, text, CSS , and translation files</li>
<li>Will exclude the cache folders since they contain to many files to scan.</li>
<li>Requires PHP 5.1.2 or greater</li>
<li>Please run this during low traffic.</li>
</ul>
This plugin will not return accurate results under IIS or WAMP stack due to how windows handles file permissions.

File Permissions & Size Check

Simple plugin that checks your WordPress install and shows your file permissions, size, and last modified date.

BuddyPress Group Folders vs File Permissions & Size Check