Western Digital WDG1C4000 My Book Premium Edition 400 GB 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 Dual interface features FireWire 400 and USB 2.0 connectivity Device holds up to 400 GB of data and is built with an easy-to-read capacity gauge Measures 5.55 x 2.25 x 6.71 inches (WxHxD)