Ketih, I have a 200 GB primary drive in the G4-450 AGP (that shows up as 128 GB) and use Carbon Copy Cloaner (CCC) to back up the primary to a secondary 40 GB drive called G4 BackUp. You should be able to use one of your existing drives as a backup drive. Dick > From: Jesper Bylund <jesper.reklam at telia.com> > Subject: Re: [G4] new hard drive issue > Date: Fri, 11 Jun 2004 11:39:19 +0200 > > Keith Whaley: >> must the receiving H.D. be at least as big as the drive being backed >> up? > > No. The backup drive only have to be as big as the data you want to > backup.