Iomega 33748 USB 2.0 1TB 2HD x 500GB Desktop Hard Drive 1TB external hard drive with USB 2.0 connection USB 2.0 offers up to 480 Mbps transfer rates 7200 RPM and 8MB cache buffer for speedy performance 1-year limited warranty Device measures 4.75 x 2.75 x 9.5 inches (WxHxD)