Glad you have found a solution.
now you have it working for sure maybe you should try it inside again. I know its a faff but at least you know the file system is correct now so if it still doesn't show its likely a circuit board or wiring problem.
just leaving it now, working fine now with usb hard drive, so dont want to mess it with it. The person i bought it from said he would change the box for another , but as i said as its working ok now i'll leave as the box is fine.