The world's most popular portable drive is now smaller than ever. And it's smarter than ever with automatic, continuous backup software and password protection. Choose your favorite fun color to look smart and stylish. Carry your music, video, and photos in style with WD's My Passport Essential Portable Hard Drive. Big capacity in a small elegant design. Available in 640GB, 500 GB, 400 GB, 320 GB, and 250 GB. These elegant portable drives are simple to use, light and easy to carry, and require no power adapter -- they are powered directly through the USB cable. Works with Windows and Mac. Synchronize files between home and office and encrypt everything on the drive for added security.