You never have to choose which files to store again, because with the WD My Book 10TB you can save everything. For example, you save 1,000,000 photos of 10MB or more than 250 Full HD movies. Automatically back up your files thanks to the WD Smartware Pro software. The WD My Book does this quietly in the background while you work. The 3.5 inch My Book has the same size as a thick book, so it doesn't take up much space on your desk. Easily carry the WD My Book in your backpack along with your laptop. You transfer your data via USB 3.0, which is up to 10 times faster than USB 2.0. A USB 3.0 cable is included.