Normally that is what happens. I guess I left my intent out sorry.
I am MOVING from one file server to another. My thought was to do a full backup one night, (about four hours), then the next night I would restore that to the new file server(thus changing unc), then the next night I would perform another full or incremental and the following night I would perform a resotre with the "skip if existing is more recent" and it would take less time. but this does not seem to be the way it is working.
I tried backing up then restored that to new server, then the next night Backed up full again, and tried restoring that again to new file server with "skip existing" but i began the four hour process to restore, I was hoping it would take less time.
I'm trying to get around the 8 hour process of moving files from one server to another during off peak times.
Thanks for the comments