[...]once the USB 3 cable is connected to the Media Player, I can no longer read the internal HHD through the media centre.
When cable is disconnected everything works perfectly.
Am I doing something wrong
This sounds familiar.
I tried a lot with my HDD to get it to work inside the Q10 Pro.
Always had to put it back in a case and use it as an external HDD, because it wasn't recognized by the Q10 Pro, only by our PCs in the network.
But - there was always a long USB cable leading from my PC to the back of the Q10 Pro.
I am currently wiping the HD in question, will reformat it to GPT/NTFS, put it in the Q10 Pro without that USB cable being connected.
I hope that works, otherwise i'll have to send the box back. :\
edit:
Are you f*****g kidding me.
Seems like it really was that USB cable.
Booting up Q10 Pro with internal HDD and no USB cable connected - HDD is recognized.
Put in USB cable - HDD vanishes from file explorer.
Will test some more.
edit2:
It really was that cable. -.-