WD My Passport Air 500 GB External HDD - WDBBLW5000AAL - USB 3.0

At just 11 mm thin, this sleek drive fits elegantly in your briefcase and in your life. This drive is designed to complement your MacBook Air with its premium, aluminum enclosure that's as durable as it is beautiful. Back up your files quickly and easily with apple time machine and secure them from prying eyes with WD Security that offers password protection and hardware encryption. With this single drive, you get compatibility with the USB 3.0 devices like MacBook Air, as well as backward compatibility with USB 2.0 devices.