Integrating file management with Organic Groups Using Drupal 7 and OG 2.x. I'm looking for a file manager to use so that each group has a files tab with the ability to create, move, delete files/folders for their group and read/write permission is only for the members of the specific group.

Is filedepot the only module for this? I have found elfinder, CKFinder, and IMCE, but it's unclear whether these are reasonably simply to integrate with OG. 

Has anyone integrated a specific file manager with OG and is happy with how it's working?
Partial answer is that CKFinder doesn't integrate with OG out of the box, or easily at all. They do offer an access control list, but you would need to know the specific directories and specific people who need access. It won't work to create folders/permissions on the fly when creating groups or add/remove permissions as members are added/removed to the group. They mentioned that a custom plugin may be possible to do to modify the access control list but that it would be quite a bit of work. Java was recommended for the custom plugin.