BuddyDrive is a 1.7 plugin by imath that uses WordPress built in features for the management of its post attachments to allow the members of a community to share a file or a list of files thanks to the BuddyDrive folders. Depending on the BuddyPress settings, the access to the BuddyDrive user’s content can be restricted to
the owner of the item only,
people that know the password the owner set for his item,
the friends of the owner of the file,
the members of the group the content is attached to,
or everybody !
Download: http://wordpress.org/extend/plugins/buddydrive/