The USB hub had with me a bug: Whenever I pressed one of the buttons to turn on or turn off one of the devices, the device is resetted and all devices separated briefly, what in particular in the transport of large amounts of data to / from my external hard drive has disturbed. So I've never operated one of the buttons again. So there is also a normal stroke without switch and lights would have been enough. After 6 months and 3 weeks of stroke no longer worked. No connected device is more recognized. I have the instrument then tried with various laptops - without success. The only working the red lights - which are always red, whether a device is connected or not.
