I think right now the most permanent way to store digital data is have enough redundant copies on enough impermanent media one is likely to survive. For example

I think right now the most permanent way to store digital data is have enough redundant copies on enough impermanent media one is likely to survive. For example my CD copy of 1998's HARDWAR might be lost due to disk rot, but there's enough copies of copies of copies floating around on various places it's still easily accessible.