Summary: I have a couple of external Western Digital drives that interface with Firewire 800. Bought this Seagate specifically because of the capacity and the Thunderbolt connection. I use the application SuperDuper for backup purposes and this drive, thus far, works perfectly.
Easy to use, very fast but MUST BE EJECTED CORRECTLY TO PREVENT LOSS OF DATA
retired teacher, Amazon
4 April 2014
Summary: I bought two of these 1TB External Hard Drives to back up my new IMac OS X 10.9.2 USB 3.0 after a recommendation from an electrical engineer. So far I have used one to back up everything but my extensive collection of photos (which are backed up elsewhere). I found this Seagate Drive easy to use and very fast. The drive DOES need to be MANUALLY EJECTED if removed from the computer.