Best way to store files locally over time (years/decades/century)??

Hi Folks,

this ? is regarding wills, sensitive info, and death instruction videos. Not that I'm expecting death, it's the will part that's important. Formal wills can be held by an attorney, but what about extra-legal "wills."??

What's the best media/product to store data long-term? Ideally unpowered and hidden in a safe. Assuming that the data can be encrypted (like with Veracrypt) and future technology is backwards compatible.

Are there any industry standard practices to store something long-term, offline and …

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