JayDz

Is it possible to have 3 computers online at the same moment. If one computer edits a certain file the other 2 computers download and overwrite that same file? So if any of the 3 computers edits a file the other 2 download it and replace theirs? Not sure what I did wrong but right now nothing is replaced. If I select overwrited edited files it just replaces it with an older version from the other computer.