[knob]

iixorbiusii,
I think you've hit the nail on the head there.

I have exact the same Rockchip player also bought from ebuyer in May,which copies files over fine but i have had the same problem with another (old) player that did not support USB 2.

I guess you may need to set your USB to Hi-speed 480Mbps and not Full-Speed which is only USb1.1 (12Mbps) in your PC bios setup.

I think it unlikely that the players were faulty.