Western Digital WDG1C7500N My Book Premium 750 GB USB2.0/FireWire External Hard Drive Easy to set up, easy to use -- Installation is a snap because you don't really "install" this drive, you just plug it in and it's ready to use. There is no CD to install; the included software loads from the drive the first time you plug it in. Dual interface -- For all-out, high-speed performance, FireWire 400 is the interface of choice. For convenience and compatibility among multiple computers, USB 2.0 is the way to go. WD Backup software -- We've provided software that makes backing up your data as easy as possible. With a few simples steps you can back up or scheduled backup all your data files or just save your picture and music files. Capacity gauge -- See at a glance how much space is available on your drive. Intelligent drive management features -- The My Book drive turns itself on and off with your computer and Safe Shutdown prevents the drive from being powered down until all your data has been written.