The Buffalo MiniStation Turbo offers compact, lightweight storage in a shock resistant case with 300GB of storage space for images, music, files and more. It is USB powered with plug-n-play connectivity so it is ready to use right out of the box. Included are mobile versions of Firefox and Thunderbird as well as SecureLockWare encryption software form Windows that prevents unauthorized access. It is compatible with both Mac (OS 9.0.4 or later) and Windows (2000 +) and is backed by a one year warranty from Buffalo. Dimensions: (W) 3.3" x (H) 5.2" x (D) 0.9" ; weight 7.9oz.