Western Digital WDML5000TN 500GB My Passport Elite Titanium is an external USB drive that extends your computer's storage with dependability and comfort. It's designed for your lifestyle and is a passport to new extensions of freedom and productivity. Capacity Gauge - Connect My Passport to your computer and see how much space is available on your drive. Automatic backup - The same powerful backup software that we included in desktop external hard drives is now available in this elegant little portable drive. Save a copy of your photos to an online sharing service, duplicate your e-mail and contacts to your iPod, and back up all the precious files on your computer to your My Passport. Set it and forget it; every time you plug your My Passport into your computer your data is automatically backed up Synchronized and secure - WD Sync synchronization and encryption software lets you take your critical data with you (Windows only) Powered directly from the USB port on your PC. No separate power supply is needed Unit Dimensions - Height - 0.59 in (15.0 mm) x Length - 4.97 in (126.15 mm) x Width - 3.13 in (79.5 mm) / Weight - 0.40 lb (0.18 kg)