I recently purchased the RetroArcade mini. It didn?t come with the rechargeable battery but it did have over 3000 games installed and ready to play. The documentation states you can add more games via external sd card. I formatted the sad card to fat32, made a folder named games in lower case as explained in the documentation and put in roms from freeroms but none of the roms will play. Did I miss a step? Can anyone help?