Let me summarize: we are talking about 2 kind of restrictions to the files:
1) On public/member side of the site:
When an admin added file link to the web pages, this link should be available to only specific groups of visitors. And even if the visitor allowed to download the document would copy the link and send to somebody else, this person will not be able to open the file.
2) On admin part site:
Not all admins are allowed to add/view/delete all files. Some admin should be restricted to only specific number of files (folders). This allows to keep files that are available only for full site admins and admins with partial admin access will not be able to view/delete or download the files.
Are both points important? Or only first one?
Evgeny
Product Design Team