The 240GB aDrive U3 Portable SSD from Akitio is a drive for Windows or Mac computers that provides faster access to your data when compared to other external hard drives. Inside the all aluminum enclosure is a 2.5" SATA III SSD that offers 420 MB/s transfer rates. It connects to computers via USB 3.0. Designed to be portable, the drive is powered via its USB connection, instead of a clunky external power adapter. Also included with the SSD is a USB 3.0 cable.