I selected this key by looking first of all scrupulously bench and others. And the key to the final absolutely not disappoint its rates, approximately 60MB / s constant write, sometimes peaks at 150MB / s on large files like blurays. I have a little less confidence in the quality of the key even if it is of good quality overall, only the button to exit the USB connector plastic glossy in the game. You should also know that this key is not really small so beware if you are looking for a small key it will not be this one, after drawback benefit to you to choose. The fact that the USB connector retracts is a good thing in my opinion, at least no worries regarding the cap oversights, although I think that the coup is necessarily less protected. In short very good key with a big capacity of good rates. The Sandisk utility is to part with data encryption etc ... in short what more?