Make required directories mkdir -p /userdata/mergerfs/VERSION_NUMBER && cd /userdata/mergerfs/VERSION_NUMBER Download newest static mergerfs build, current built now can be found HERE extract tar -xvzf FLIE_NAME.tgz cd ../ && ln -s VERSION_NUMBER current Create disk labels so we know what to add to the script, replace LABEL_NAME and /dev/sda1 with your disk info e2label LABEL_NAME /dev/sda1. Thankfully batocera mounts disks by label in the /media/ folder Create script to mount nano mergerfs.