How do you actually store your backup?

Everyone knows the advice: steel plate, multiple locations, never digital

I'm interested in what people actually do, because I suspect there's a large gap

Specifically:

- Paper, metal, or something else?
- One location or several? How far apart?
- Does anyone else know where it is, or does it die with you?
- Have you ever actually tested a restore, or is it theoretical?

(r/Keycard_tech team - but this applies to whatever you're running)