Great capacity with style to match! The Iomega eGo Desktop Hard Drive USB 2.0 provides a simple and stylish solution for all your storage needs. Ideal for adding capacity, this plug and play drive is available in 1TB capacity and holds up to 4,000,000 photos, over 18,500 hours of music and 1500 hours of video. With EMC Retrospect HD (PC) included (via download) for easy file backup, it's the easiest way to save photos, music, videos and more! Memory cache - 8 MB Format - NTFS System Requirements - Built-in USB connection; Mac OS X 10.1 - 10.5 (Drive must be reformatted for use with Mac); Microsoft Windows 2000 Professional, XP, Vista Approximate Unit Dimensions - 5? x 8.1? x 1.65? Approximate Unit Weight - 2.43 Pounds