Write speeds are between 7 and 15 megabytes per second. Read speeds are between 0.25 and 51 megabytes per second. 10 times faster, they said. It's actually 85% of the speed of USB 2.0. The top transfer speed was only for a few fractions of a second. The grayish silver painted plastic looks incredibly cheap. It was hard to retract the sliding connector cover. Complete disappointment. It was a huge mistake to believe specifications and start using USB 3.0 devices.