WD - 4TB Desktop SATA Hard Drive - OEM - Black

Dual USB 3.0 and USB 2.0 compatibility Up to three times faster transfer rates - When connected to a super-speed USB 3.0 port this drive lets you access and save files up to 3 times faster than USB 2.0. Transfer a 2 hour HD movie in just under 5 minutes instead of 14 minutes (performance may vary based on user's hardware and system configuration) WD quality inside and out WD SmartWare software - you are in control of your backup. Install all the features, select just the components you need or if you prefer choose not to use the software at all Automatic, continuous backup - works quietly in the background to protect your data using minimal PC resources. Whenever you add or change a file it's instantly backed up