. The tuner worked only on 1 of the 2 ports - the left front one. And I then tried mounting a USB thumb drive into the left back port - without any success.
Bottom line is that 1 of the 2 USB ports does not seem to function, not to mount a USB drive, nor as a port for USB TV tuner. When I insert a USB drive, the drive light flashes but the drive is not mounted
I can not help you but have similar results on my Mecool M8S Pro Plus with stock Android 7.1.1 LibreElec was installed along with the files wrxtasy provided. I have no problems using the front USB port but get nothing using the rear usb port.