As stated I just purchased my first Mac, I bought a 24" 2.8gig iMac with 4gig of ram. Let me say I am not technically challenged. I have been a PC user since the old DOS operating systems, but figured it was time to give OS X a shot. Anyway I hooked a 500gig USB hard drive up for the time capsule back up. It has only been hooked up for a week and it has already used 135 gigs of space. At this rate i'll have to get a new hard drive every month. I have to be doing something wrong. Some setting, something?