Western Digital WDG1T5000N My Book Pro Edition 500 GB USB/Firewire Triple Interface External Hard Drive Store and back up your music, photos, videos and important documents with this external hard drive Easy to set up and use with built-in installation software; also comes with EMC Retrospect Express for backups Triple interface features FireWire 800, FireWire 400, and USB 2.0 connectivity Device holds up to 500 GB of data and is built with an easy-to-read capacity gauge Measures 5.55 x 2.25 x 6.71 inches (WxHxD)