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.

sh4d0w28

GoogleDrive folder list allows you to insert a document list from any shared folder in google drive.
<ul>
<li>Works only with full-shared folders in GoogleDrive</li>
<li>Login to Google services is not required.</li>
<li>Customized title</li>
<li>‘thumbnail’ mode:
<ul>
<li>displays thumbnail or the first page of uploaded document.</li>
</ul>
</li>
<li>‘list’ mode:
<ul>
<li>displays download links for each document;</li>
<li>can go through nested folders</li>
<li>has options to adjust CSS styles from administration panel</li>
<li>easy integration in the post or page (just a shortcode)</li>
</ul>
</li>
</ul>

GoogleDrive folder list

GoogleDrive folder list allows you to insert a document list from any shared folder in Google Drive without Google authentication.

BuddyPress Group Folders vs GoogleDrive folder list