Bipra 320GB 320 GB USB 3.0 2.5 inch NTFS Portable External Hard Drive - Black Aluminium body for better cooling and protection Hot Swappable and Plug and Play , No Driver Needed(Expect for Windows 98SE) USB Bus Powered - No External Power Needed High Speed USB 3.0 (Up to 5Gbps) data transfer rate and backward compatibility USB 2.0 Compact Size, Easily fit in Pocket, 1 Year Warranty With Bipra LLC