lsblk -f
Add a line to /etc/fstab
such as
UUID=05C5-A73A /mnt/32GBkey vfat noauto,nofail,x-systemd.automount,x-systemd.idle-timeout=2,x-systemd.device-timeout=2
Merci à https://unix.stackexchange.com/questions/347006/systemd-how-do-i-automount-a-usb-filesystem-using-etc-fstab