Carry your data with you, wherever you go, with the My Book (WDBACW0020HBK-NESN) hard drive. With Mac and Windows compatibility, this Western Digital hard drive lets you have the choice of using it with the OS of your liking. This external hard drive hard drive comes preloaded with WD SmartWare visual backup software, which allows you to backup all your data with just a click of a button. This Western Digital hard drive is compatible with both USB 2.0 as well as 3.0 interface, giving you high-speed transfers. This My Book (WDBACW0020HBK-NESN) looks amazing and will complement any surrounding. This external hard drive is great for extending your local storage, as well as creating a backup of all your important files.