I got the 2 TB hitachi hd with mine. First time I have ever had a drive that exceeds the amount listed. It's rated at slightly over 2TB!!! I have 1.99 Tb left to transfer from my 24 inch iMac. Also, did the screen test. It came out good so far without any problems. This screen is incredible. My wife saw it and said it would be great for scrapbooking. I told her she'd be wanting one before long. Anybody know what drive would be good as a time machine drive for this monster drive? Should it be partitioned and use two drives? Can that be done?