The problem was only when I tried to plug the stick into the besage MacBookPro. This was only possible with considerable effort, not to mention the withdrawal. Since I did not want to damage my USB sockets I have this not too many attempts.
Hence my warning (which I would retire if other buyers thus had no problems): The drive does not fit into the USB socket of a current MacBookPro!
Since this drive otherwise works perfectly and is amazingly fast he would get 5 stars.
However, I prefer from a star that he is to make use of my MacBookPro for me.
So 4 stars for a pipsqueak with 32GB storage space.