Bipra portable external hard drive has capacity 320gb, Colour black, 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: 320GB 2.5 inch laptop hard drive, a sata hard drive, 9mm thick, 5400 rmp, very fast drive, 8MB buffering. Storage Capacity on a 320GB External Drive is 160 hour DVD-quality movies, 230 hours of VHS-quality video, 160 days of around-the-clock MP3 audio, 160000 digital photos, 2300 action-packed games.