The stick is not recognized on the Zenbook! On a desktop PC with USB 2/3 he works, but is rather slow.
Speed with ATTO Disk Benchmark:
USB 2 Read: ~ 29MB / s
USB 3 Read: ~ 33MB / s
USB 2 write: ~ 13MB / s
USB 3 write: ~ 13MB / s
There must be no USB Stick 3 ...