After a few weeks using it will still be recognized, but it is no longer possible to access. After some poke around in the system, I have found the reason. Apparently something is blown in the stick, because it draws more power than the USB Schnitstelle a computer can provide, which is why the computer for their own protection switches off the supply voltage. The Fürt to the bit is recognized, but can not be addressed. Given the very short life not recommended. Is not worth the money.