NetDISK Storage Enclosure Just add a 2.5 hard drive - up to 500GB maximum storage capacity for expanded storage for your files USB 2.0 and e-SATA interfaces High-speed USB 2.0 interface USB-powered, so an AC adapter is not required for most computers Backward compatible with USB Data transfer rates up to 480 Mbps for quick response when updating files Easily synchronize data from your computer's hard drive