I had to format the NTFS partition again, now works.
Other stuff I'm seeing:
1. missing rom (firmware). Everything seems missing from the GUI, but the files are there. Gave me a bit of a headache but I managed to get to kickstart.
2. I go to kickstart, and then nothing. It seems (seen via "ps") that batocera passes the .UAE file as "floppy image", so the emulator is trying to boot a config file, and fails.
PS: Where those log/es files are supposed to be ?