[survirtual]

Just use this:

https://en.wikipedia.org/wiki/5D_optical_data_storage

5d is a bit dramatic but it is a femtosecond laser writing of quartz crystal that should, in theory, be stable for billions of years and can hold hundreds of terabytes.

Seems to be just what is needed.

[jl6]

Sadly it appears to be early-stage R&D vaporware.

[xerox13ster]

It was early stage R&D vaproware in 2013 when I read about it the first time.

https://www.scientificamerican.com/article/data-saved-quartz...

[survirtual]

That’s a shame. I saw it earlier on Reddit and read the wikipedia article, seemed promising.

[literalAardvark]

Microsoft's "Project Silica" is in early production.