The briefcase that my Testuser can see in the Frontend does not what it should:
- the user can not enter (by clicking) his own Briefcase diretory nor use do any other functions , like create new directory,
- the user can see not only his directory, but also the directory of other users (but not entering that either)

I used RSFiles by attaching "Briefcase" to a Menue Function, choosing RSVario as template. The website includes also other
components, not all by RSJoomla.

The testuser is member of an RSfiles Group, that has all possible RSfiles rights (e.g. moderate uploaded files:yes, ... ).

is there a document, that shows the workflow how to implement briefcase functionality ?

My final goal is that
some files can only be seen by their "owning" user (-> briefcase)
some other files (group files) can be seen by users, which are in that group

Thus a user A, in Group No.3 can only see the "A-files" in his briefcase and the "No1-files" in the Group Directory.