After 0.5 GB defective (64GB version)

After all the bad reviews I was clear that I buy no top product here - but the reality is my low expectations but once again significantly exceeded (unfortunately in a negative direction):

The first 170 files were written amazingly fast, but then the Win-Explorer is frozen and nothing was more. After that there was an error message from the operating system that it does not recognize the USB device, and since then the good piece is dead.

It seems to me there are so blatant lack of quality here that you simply can not use this stick. Luckily, it has been shown to me so early.