Iomega 33179 Silver Series 500 GB USB 2.0 External Hard Drive 3.5-inch 500 GB external hard drive with USB 2.0 connection USB 2.0 for up to 480 Mbps transfer rates 7200 RPM for fast read/write times 1-year limited warranty Device measures 4.5 x 1.25 x 7.25 inches (WxHxD)