Backing up EdgeRouter X

On commit, save the router config to an external server

scp will push the file to the remote over ssh.
SSH keys don't work, so must use password.
Create a user edgerouter-backup on the target host.
Only allow password login for a specific user
Set Up automatic backups

configure
set system config-management commit-archive location "scp://edgerouter-backup:password@host.lan/path/to/parent"
commit ; save

Now you can back up the local files with duplicati.