Western Digital WDG1T7500N My Book Pro Edition 750 GB USB/Firewire Triple Interface External Hard Drive Triple interface -- FireWire 800, FireWire 400, and USB 2.0 EMC Retrospect Express -- Powerful backup software that includes full system backup and recovery, easy scheduling, and encryption. Capacity gauge -- See at a glance how much space is available on your drive. Intelligent drive management features -- Automatic power-up, Safe Shutdown, and LED activity lights make this drive especially easy to use. Smart design -- The compact elegant case, iconic of a book, takes up less space on your desk, stacks horizontally, and allows two or more drives to nestle neatly together like volumes on a shelf.