Originally Posted by RedScorpioXDA
this can happen if the USB cable is poor or too long, or if the USB ports are faulty. Try combining ports/cables
This is what I was suspecting also already, I tried on other USB ports, the cable is the original furnished one, not long and in good state then I wasn't yet testing with other one. But on different USB ports directly on the mainboard in back computer, same. Then on another computer having yet USB 2 in case was the USB 3 problem but exactly the same too. When I use Android Tool for Rockchip, reading separately memory images, it can read from beginning of memory till 'resource' and from kernel, nothing, always Fail.
I don't think a protection could have been enabled on a part only of memory... I'm lost