Save all your favorite vacation photos in high quality on the WD My Book 3TB. You can keep about 600,000 photos or 750,000 MP3 songs on this My Book. Automatically back up your files with the WD Smartware Pro software. The WD My Book will silently take care of everything in the background, while you're busy working, so you won't have to worry about a thing. Because the My Book looks like a book, you can stylishly hide it between the other books on your desk. It's also easy to take both your 3.5-inch WD My Book and your laptop with you in your bag.