The problem is i can not use a centralized server for performance reasons - 34mbit just isn't enough bandwith. I would have to use a fileserver in each location and that would not realy help as i would have the problem of keeping them in sync again.
The data of the servers is mostly used on the server it is stored, but if a user wants to access a file that is not on his server he has to wait a day at the moment - or copy it manually.