Hello @Greg this is great to hear you found the MAME 2003 plus DAT file; Sometimes, files might not be visible or accessible directly from the SD card due to permissions or mounting issues.
When accessing files over a network, the file system might present a different view compared to direct SD card acces; This could explain why you didnt see them initially.

@poppadum Yes it's working, my bash script is on:
/home/mentalo/Documents/Scripts/recalbox/backup_saves.sh

#!/bin/bash ssh_key_abs_path="/home/mentalo/.ssh/" ssh_key_file_name="id_ed25519" # be sure to generate private / public keys before to run the script ssh_connection_user="root" ssh_host_name="recalbox" # be sure to add in /etc/hosts the hostname "recalbox" with the IP (generally 192.168.X.XX) src_recalbox_saves_dir="/recalbox/share/saves/" dst_recalbox_saves_dir="/path/to/local/backups/directory/" rsync -rltvh --modify-window=1 -e "ssh -i ${ssh_key_abs_path}${ssh_key_file_name}" ${ssh_connection_user}@${ssh_host_name}:${src_recalbox_saves_dir} ${dst_recalbox_saves_dir}

Small but super-efficient 🙂
Now I'm going to add a file to put variables, check directories before to run rsync, add the script in crontab, etc.

Maybe it could be added in the Recalbox documentation?

@poppadum Thanks

@luc1anocruz

7.0 version of recalbox

The forum does not support outdated versions...

@zezuvu Yes overlay is empty when reading externaly, it is crowded during boot with file system contained in the RECALBOX/boot/recalbox file.

Exact, missing bios are 'missing' because they are copyrighted. You can only play with Google to find them (try with the bios name and their MD5).

@jorgemagana thanks!

Recalbox.conf
Is the file to enable shuutdown script.

@yadid Do you have the right BIOS version? See this link:
https://github.com/recalbox/recalbox-os/wiki/Add-system-bios-(EN)