Bipra portable external hard drive 250gb colour SILVER, Plug and Play with USB 2.0 for Windows, Powered by: USB 2.0 (No external Power Required). What Hard Drive is used in this product: 250GB 2.5" laptop hard drive, a sata hard drive, 9mm thick, 5400 rmp, Very fast drive, 8MB Buffering, Average seek time: 12ms. Storage capacity on a 250GB External Drive: 130 hour DVD-quality movies or 200 hours of VHS-quality video or 130 days of around-the-clock MP3 audio or 130000 digital photos or 1900 action-packed games.