External hard drive offers a way to save precious files and memories and add capacity to your computer system. Simple USB interface is easy to use. Simply plug and play. Secure hard drive includes EMC Retrospect Express software license for PC and Macs and free MozyHome Online Backup (2GB capacity). Offers preformatted NTFS, fast 7200 RPM, 500GB memory and USB 2.0 connection. Energy Star qualified.