The Western Digital WDBB7B0020BBL-WESN is a 2TB portable external hard drive that is compatible with PC, Chromebook, and Mac. It has a USB 3.0 specification and a rotation speed of 7200 RPM. The drive is USB-powered and has a USB port. It has a black color and a form factor of 3.5 inches. The storage format is HDD only and the interface is USB. The item dimensions are 4.22 x 2.95 x 0.53 inches (L x W x H).