I just set up my Mini as a server with an external drive for Time Machine Backups from my MacBook. I backed up my MacBook to the Mini's External Drive the first time a couple of weeks ago just fine. about 450 Gigs. I'm doing another backup now and only added 5 Gigs of photos - Time Machine is backing up the entire 455 Gigs again? I thought it would only backup the extra 5 Gigs... Anyone know why or can point me in the right direction?