USB device

USB device partition

[Type] and [Options] are optional for disk devices. To reduce unnecessary writings to SSD devices the noatime option is recommended.

mount unit

Name the file according to $YOUR_MOUNT_PATH.mount

[Unit]
Description=Mount USB backup device partition

[Mount]
What=/dev/disk/by-uuid/$UUID
Where=$YOUR_MOUNT_PATH
Type=ext4
Options=rw,noatime

[Install]
WantedBy=multi-user.target

USB partition automount unit

Name the file according to $YOUR_MOUNT_PATH.autommount

[Unit]
Description=Automount USB backup partition

[Automount]
Where=$YOUR_MOUNT_PATH
TimeoutIdleSec=10

[Install]
WantedBy=multi-user.target