MOUNT_POINT_='/run/live/medium' # since Dec. 2018
elif [ -e /lib/live/mount/medium ] ; then
MOUNT_POINT_="/lib/live/mount/medium"
MOUNT_POINT_='/run/live/medium' # since Dec. 2018
elif [ -e /lib/live/mount/medium ] ; then
MOUNT_POINT_="/lib/live/mount/medium"