The Buffalo JustStore Portable USB Hard Drive HD-PVU2 is a lightweight storage solution designed for simplicity. JustStore Portable occupies minimal space and offers USB powered mobile storage for your data and for your on-the-go lifestyle. Purpose built, JustStore Portable provides plug-and-play storage expansion for your Windows and Mac computers. Included with JustStore Portable is Buffalo's TurboUSB utility which optimizes USB transferring on Windows computers increasing transfer speeds by up to 20% over competing USB 2.0 portable hard drives. Store and transport photos, music, videos, documents and other files on the high capacity and easy to use JustStore Portable hard drive.