So you are pretty much saying that you cannot have both an SD and a flash memory chip connected to the SBC at any time?
I can live with that I really can.
I have the Batocera OS fully working now, I do have problems though mainly with PSX emulation, I have THPS2 (Tony Hawks) in my roms folder, taken straight off my Pi3 which worked pretty well with no stuttering only to find it runs worse on this XU4.
Has anyone else had problems with massive lags or delays with PSX games before?
Think I will be getting rid of this XU4 if it dont start beating the Pi3, it's only reason I bought it for PSX and Dreamcast emulation