Increase your productivity with the new Express ST1 line. Regardless of the enclosure type you choose, the USB 3.0 ST1 uses the new ToggleMode™ DDR (double data rate) ash at its core to give you up to 90MB/s read and 16MB/s write performance. - Affordable, high performance USB 3.0 drive - Up to 90MB/s Read and 16MB/s Write speeds - USB powered - no external power is required - Fully compatible with USB 3.0 and USB 2.0 (with some of the fastest USB 2.0 scores)