I don’t have that option:

Doesn’t help if I tap subscribe before either.

Edit: Found it! It’s not possible when searching for it but it works in the “Feeds” section:

How would I handle backups though? I have some data I should definitely back up in some way, e.g. Nextcloud or paperless-ngx. A mirror is good but doesn’t replace a backup :D

That’s why I brought in Proxmox Backup Server, not sure if that’s overkill though or if I can backup using Proxmox VE itself. I’ve also read about people running Proxmox Backup Server as a VM inside Proxmox. That way I only have one physical machine but I’m not sure how complicated it would be to access the backups if the Proxmox VE host itself goes down.

Das Feuerwehrlied darf in dem Kontext auch nicht fehlen: https://feddit.de/post/1550999