My dad also used to self-host. Now I run all of the services he used to, and more.

Anyway, his server is still around so I thought I might as well use it for an offsite backup box, I run a matrix instance and nextcloud, as well as other things. But those two are the contents of which matter most.

How would you set this up?

Just a nightly rsync over sftp? That seems ineffecient. Is there a best way ro do this?