SanDisk SDDR-B531 MobileMate USB 3.0 Card Reader is a great accessory built for personal and professional use. Featuring USB 3.0, the read is almost ten times faster than a USB 2.0. It offer transfer speed of up to 170MB per second that allows you to transfer data really quickly. The reader is backward also compatible with USB 2.0. The compact design enables you to carry it around with ease.