Thanks Brian, but my issue is that although the assemly drw files will be backed up this way, all the part drw files will not be backed up. This is a problem with large assemblies, ie. plant assemblies
I think your only alternative is to back everything up using somekind of backup software. You will actually have to copy everything. There is nothing within Pro-E to capture all of the drawings to the parts in an assembly.
If your using UNIX, try rsync. Its free and works great. Otherwise, there is an array of Windows copy/backup software out there. I really like Second Copy. You can find it at http://www.centered.com/. If your worried about having to get another hard drive, dont be. Hard drives are cheap. A lot cheaper than lost time if your current hard drive goes down.