Skyline-Technology's S-DRIVE mobile SkyMini/USB 3.0 hard drive is easy to set up and carry anywhere with your SkyBook for storing your most important digital video, music, and documents. Inside its sleek, beveled aluminum case is a high-performance 7200 RPM hard drive with a choice of ultral-fast SkyMini or USB 3.0 connectivity. It's also bus powered, so there’s no need to carry an external AC power supply.