Basically:

• Small proxmox node (Zima) that basically does only operate a Proxmox Backup Server for local clients and fast backup.

• Offsite ZFS send to a VPS I operate for that purpose. As well as Proxmox Backup Server for VMs,etc. Basically meant as a fast recovery option.

• Offsite S3 storage backup to a different provider from above. Meant for a medium term backup.

• Portable HD: I have two different portable HDs. One is hooked up to the Backup server, the other one is in a lock box in my banks safe. The “connected one” does a weekly backup (and is switched off in between). Once in a while (around 6 to 12 weeks, with 12 weeks being the hard maximum) I take the active one to the bank and both drives switch places. That provides a full backup.

• Last line of defence: The real real important things (photos of life events-weddings,etc.- important documents,Password DBs) etc.) get burned on a M-disc Archive blue ray. They are also in the bank safe and at a secure third location. They are more meant for “shit hit the fan and I might not be there anymore,but maybe the kids want these”.

This is another thing to consider: Have detailed descriptions for others how to retrieve your data in case something happens.