This is probably something most people aren't even aware of, but when you edit a file from a network drive, Revit saves a copy in your Journal folder
(C:\Users\you\AppData\Local\Autodesk\Revit\Autodesk Revit 2018\Journals)
This has caused problems in our office when people, over the years, end up with hundreds or even thousands of .rfa and .rvt files in their Journal folder.
Since most people aren't even aware of these "backups", they never get flushed out and have been filling up of hard drives.
We do not need these backup copies.
We have a network, and it is very good about making it's own backup copies.
I would encourage everyone to take a peek at their Journal folders. You may be surprised at how much is in there.