This is a first draft, so take it accordingly. I think it covers all
aspects of the file transfer functionality, but please - especially Tomas
- give me your feedback if this is possible and is already written and
conceived. If there are functionalities you've thought of that aren't in
the use case, please add them.
Again, this is a wiki, so you can make the changes to the use case
yourself. The system provides for version tracking.