melawy-archiso-config/Melawy-Linux-Developer-Edition-Custom/airootfs/etc/systemd/system/mount-data-flash.service

[Unit]
Description=mount data flash
Before=graphical.target

[Service]
Type=simple
ExecStart=/bin/sh -c /usr/local/bin/mount-data-flash.sh

[Install]
WantedBy=multi-user.target