So new angestöpselt (paid tightness), and exactly the same game - a few minutes ok, but after a few gigabytes (no matter how much time is between transmissions) increased, at the end of massive problems ("Delayed Write Failed" etc. )
The (short) original cable there is no problem, here I can copy tens GB.
The cable is available for me though because I alternately operate the drive for TV recordings to a USB 2.0 interface - but it will run as 3.0 and can not afford this permanently.