@nebura45 See if this helps:
https://recalbox.gitbook.io/documentation/v/francais/tutoriels/systeme/installation/montage-automatique-de-lusb-a-la-place-de-la-partition-share https://recalbox.gitbook.io/documentation/v/francais/tutoriels/systeme/installation/utiliser-un-peripherique-usb-de-stockage-sur-recalbox