Hi Christian,
unfortunately no...I have two minds here. one is cleaning the file system by deleting the archived message folders created by archive job manually after some specified period from archiving cockpit by just deleting the collection in hierarchy. second one is removing the content from the file system and placing them on tapes. This will make the archive location available for the archive job to place the new archive messages. if you have any experience here please share the practice that you have followed.
regards,
Bala