You’re right about testing backups. I will have 2 different backups, one for my config and the second for the irreplaceable media. Indeed, restoration from Glacier is too expensive for the data that I plan to back-up.

I was looking at Scaleway’s Glacier offering, B2 and iDrive. How do you propose I test my backups? I could certainly pull in my config and test it on a VM, but how do I check that I have backed up my media? I plan to encrypt, compress, deduplicate and then ship it off.