You are absolutely correct. I don’t mind the few GB’s worth of data for the operating system, a single video with my drone is likely more than that and it’s not something you can deduplicate nor compress very well. If I really wanted I think it should be possible to squeeze the operating system at least below 2GB, but it’s just not worth the effort. I just want that the memories over 20+ years I have on the thing to remain.
Proxmox backup server (at least from proxmox) is way more expensive than any raw storage option. For the external drives, I won’t do that. The server has RAID setup on disks and adding another local disk wouldn’t achieve anything on my situation as I need an off-site copy.
The storagebox -option isn’t as flexible as S3 on Heztner (it jumps from 1TB to 5TB) and thus costs a bit more for capacity I don’t need in the near future, but from proxmox side of view that should be pretty foolproof option.
https://www.offlineimap.org/ should do the trick
As a service it’s not free, but apparently I’ve misread the proxmox website in a hurry. I’m not too familiar with their licensing, but even if I’d get a VPS and enough storage for it to run a proxmox backup server it’s still more expensive than just a raw storage from somewhere.