The Western Digital 250GB External HDD is a portable hard disk drive that is tested with a cable for compatibility with laptops, PCs, and Macs. It features a Mini USB specification and a sleek black color design. This USB-powered external HDD offers 250GB of storage capacity and a rotation speed of 7200 RPM. Part of the My Passport product line, this hard disk drive is ideal for on-the-go storage needs and can easily be connected to various devices via USB for convenient data access and transfer.