The stackable Touro Desk Pro external drive provides superb ease of use, two levels of protection and 3 GB of cloud storage. Enjoy two levels of data protection, with both local and cloud backup, to keep your photos, movies, music and documents not only safe but available anytime, anywhere, from any smartphone or computer web browser. You can even share your online content with others by simply sending a web link. Includes fast USB 3.0 interface. Need more online storage? Upgrade to a paid account and receive 250 GB of cloud storage along with iPhone and iPad mobile digital device apps. Box Contents: Touro Desktop Pro external hard drive, Preloaded local and cloud backup software, USB 3.0 cable (backward compatible with USB 2.0), Quick Start Guide, 2-year limited warranty Features 3.5-inch External Hard Disk Drive, 7200RPM Specifications Interface - USB 3.0 compliant, USB 2.0 compatible Connector - USB 3.0, 9-pin Standard-B socket / USB 2.0, 5-pin Standard-B socket Data Transfer Rate - USB 3.0 - up to 5 Gbit/sec / USB 2.0 - up to 480 Mbit/sec Operating Systems - Windows XP, Windows Vista, Windows 7 and Mac OS X (10.5 or newer) Web Browsers - Internet Explorer (7 or newer), Mac Safari (4 or newer) Dimensions - 5.08 x 7.02 x 2.36 in. (129mm x 183mm x 60mm) Weight - 2.1 lbs. (0.97kg) estimated