So you want to upload files to your BuddyPress group? The BP Group Documents plugin can help. It creates a page within BuddyPress groups to allow members to upload and store files. Documents can be edited and deleted by the group admin or the document owner. You still get to set filters on file extensions and change display options.
BP Group Documents lets you organize documents under categories. Activity is logged. The admin can still decide file extensions and set display options. You can also decide if only a certain group of people can upload documents. The script offers download verification (users are redirected to a page when document is downloaded). There are 3 widgets available you can use to show popular downloads and upload information.
BP Group Documents enhances your BuddyPress site by making it easy to upload files to groups and exert control over who can do what. You can also control which file extensions are allowed. This is a free plugin.