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by justinclift 1506 days ago
Probably depends on the quantity of data. If you're talking GB's or TB's of digital data, then maybe "archival grade" DVD's or BluRay's.

https://www.verbatim.com.au/product-category/data-storage/op...

If it's instead just a few short strings of text (eg GH password recovery codes), then you could use physical storage.

eg engrave the codes into something that'll survive extremes (granite?), and keep them in a fire proof safe.

Or something along similar lines. Probably don't engrave into glass though, due to that potentially shattering in some situations.