Compact and easy to use, the plug-and-play compatible 1TB Expansion Portable USB 3.0 External Hard Drive from Seagate installs in seconds, simplifying the process of adding 1TB of storage for your PC. It comes preformatted for Windows systems and connects via an included USB 18″ cable. To transfer large files quickly and efficiently, it utilizes USB 3.0 technology that provides speeds of up to 5 Gb/s. Moreover, the bus-powered Expansion drive doesn’t require an external power source making it suitable for on-the-go use.