

Yeah this is what I do. All the important or irreplaceable stuff easily fits on a USB HDD, and I leave one with a friend I visit regularly. I just run three drives total and no more than two of them are in the same place at the same time. Cheap, simple, and a good excuse to catch up.
This worked for me when I was first setting up Proxmox.
dd bs=1M conv=fdatasync if=./proxmox-ve_*.iso of=/dev/XYZ