Reflections about a remote shortwave listeners station

I didn't come to any solution working with this ext. powered hub. The Tablet didn't charge and run the ELAD FDM-S2 at one time. Following a tip I cut the ground line of the mini-USB-connector, but this didn't work either. It's reconnected again. I tried to connect 470 Ohm resistors in both data cables of the connector. (As described in Perseus_SDR Group)
According to the Perseus_SDR Group link the resistor should be set only between line A und B, but this does not work with the Tablet either. Connecting 124 kOhm and 36,5 k Ohm resistors (from: ... searchtips) in the same way did not work either. May be it's all bullshit.

At this time I dont see any chance to charge and run the ELAD FDM-S2 in parallel with this Trekstor Surftab wintron 7.0.

Just to confirm how the Trekstor Tablet works with the Logilink UA0140 Hub (without external power supply)

USB-in cable connected to power line
Connectors:
Pos. 1 Ext. HD 2TB = tries to connect but fails
Pos. 2 FDM S-2 = connected, but offline
Pos. 3 Tablet = charging