i just found out that if you put your roms on usb storage, they will show up but not work, but if you have them on your SD card my roms work brilliantly.
This is of course after i have run the roms through the clrmamepro with the correct datfile which can be found in the mame directory
So i don’t even bothered with finding what more config files to edit to get it to work through usb so i just bought a 32 gig sd card(as clarification: i had it on usb permanent in other words i edit the es config file so it wont copy it from usb to sd card but actually run it from the usb stick)
hugs
