Add high-capacity storage instantly to your PC or Macintosh computer using a USB 2.0 connection. Includes buttons for automatic or on-demand backup, and a convenient front-mounted power switch.High-speed storage, conveniently placed controls and easy-to-use scheduled or on-the-spot backup make the WD Dual-option external USB drive an ideal solution for much-needed additional storage. Its a perfect place to store your valuable data, music, photos and movies.