External Portable 500GB USB 2.0 External Hard Drive featuring with 7200RPM, 16MB Buffer SATA Hard Drive with 1 Year Manufacturer Warranty. This is a high performance, great value, high-speed USB 2.0 hard drive that can be used to add DVR functionality to your DISH Mobile ViP® 211k HD Receiver (DVR activation fees may apply). You can also use this hard drive with Windows OS and Mac OS. USB 2.0 transfer rate up to 480mbps. Each hard drive is assembled, pre-formatted and fully tested in USA before we ship out. Use this portable hard drive for backup, data sharing, data transferring between your office and home. Easy plug-n-play connect via USB interface supporting transfer rate up to 480mpbs!