Great idea - but will not work with any device

The Logitech G930 Headset, for which I had bought the switch initially, is recognized, however, the signal breaks off again, so that the sound comes out of the speakers and not from the headset.
My 4 Spyder is recognized, however, calibrate does not work - because it is not a valid device found.
Both USB Flash Drives (3.0 and 2.0 with hardware encryption) as well as my external 2.0 hard drive to function properly, however.

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Here the original review, the switch was apparently defective and was replaced:

Property me concerned the switch to activate the Logitech G930 headset comfortable, and not always the dongle and a need to unplug.
The headset is recognized, however, can not be operated. Out of interest I still tested my external hard drive and my USB drive, and my Spyder 4, with the following results:

- USB stick (3.0) is not recognized.
- USB hard disk (2.0) is detected, data transfer impossible break after just a second.
- 4 Spyder is recognized, however, does not.

I have no idea how the equipment is built, if I caught a Monday device or not - but that's no use.