Hi and thank you awiouy,
The only difference with mine is that I use "/storage/Sync" rather than "/var/media/Extra". It's important to put in "/var/media" ?
Code
LibreELEC:~ # cat /storage/.config/system.d/storage-sync.mount
[Unit]
Description=cifs mount script
Requires=network-online.service
After=network-online.service
Before=kodi.service
[Mount]
What=//192.168.1.33/SyncThing
Where=/storage/SyncThing
Options=username=XXX,password=XXX,rw
Type=cifs
[Install]
WantedBy=multi-user.target
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But systemd says it failed :