External USB 3.0 hard drive connected directly to the PC, goes. The USB extension the lamp is lit on the hard drive, but Windows does not recognize this. Why is 1 star too good for it.
Addendum: the NOX divendo GmbH has sent me an identical cable. It infected the hard drive that is running and is detected, a 1 GB test file it with 83 MB / s and copied works.
No idea why it hung, now it goes and so gets the cable its 5 stars.