Seagate 500 GB USB 2.0/FireWire External Hard Drive ( ST3500841CB-RK ) High-performance 7200-RPM drive with 8 MB cache Back up with the touch of a button. BounceBack Express software backs up faster and easier than any other method On/off button eliminates concerns that your hard drive hasn't been shut down safely Built-in self-monitoring technology continuously checks your hard drive for data safety and drive performance Advanced software lets you quickly retrieve files