As a Domoticz user, I discover Duplicati as backup utility.
Duplicati can make a copy of your maps/files in the cloud.
I use now also this perfect backup routine for MagicMirror to Dropbox.
You can find ta clear procedure on the follow link.
https://sancla.com/domoticz/how-to-backup-domoticz-with-duplicati/
You must just adapt the procedure for selecting the desire maps/files on MagicMirror)

best regards

jms3700