Sony MRW-S1 UHS-II USB 3.0 reader/Writer for SD cards enables the fast transfer of data from SD cards via a fast USB3.1 Gen1 Interface. Able to read/write to UHS-II and backward compatible with UHS-1 SD cards, the MRW-S1 makes reading from cards faster than using the computer's SD card slot by using the faster USB 3.0 connector on most current computers and laptops. Using a USB 3.0 interface, the reader can read UHS-II cards up to the read/write capability of the SD card inserted and the USB connected computer speed and capabilities. Using the MRW-S1 can help speed up the work and reduce the waiting time. Designed with the newly announced Sony UHS-II SF-G series SD cards In mind (with speeds up to 300MB/s read and 299MB/s write), the MRW-S1 can make short time of transferring/reading files to the computer.