Super, that's good to know, thanks! So I can continue preparing on my 3B :)

@bardem
Hi, if you boot with eMMC, you can not use CD card.
With system on eMMC, i recomman to put all ROMs on USB stick.

My bad... The config of my keyboard had just nothing to do with everything I could find on the web... It actually works.

@substring It works! Thank you so much

@disorder This could be caused by how configgen "detects" pads. Can you make a pastebni of ~/.emulationstation/es_log.txt ?

@Dinierto I am relatively new to recalbox, but I was looking through the /recalbox/share_init/system/.emulationstation/es_systems.cfg and I saw that there were options to edit the retrieve location for each individual system.

Could the desired result not be achieved in this way, storing roms for certain systems on the sdcard while storing others on flash drive?