+1 on duplicity. I run it directly on the host, outside of my docker containers. Grabs the data from the different volumes for my Nextcloud etc, puts it all into an AWS infrequent access bucket. Costs me ~3$USD/month. Pretty simple. Runs on cron

Sortaaaa, it’s pretty weak from what I remember and mostly served to give you a reason to explore more of the sandbox and use the different features of the game.