And by long term here, I’m talking LONG term. If it could survive a couple ice ages, that would be super. The longer, the better. And I’m more interested in earth-based storage rather than space storage, unless there’s also a clear method of retrieval. Shooting a metal tablet into the void between the stars might preserve it a long time, but how would anyone ever find it again? Maybe a silly question, but I’d like it based on at least some practical concern for potential info retrieval. How long could we conceivably store information right now with the tech we have available to us? What storage technique would that be? Assume cost isn’t really a huge issue.
I got thinking about this because of the difference between the old Mesopotamian cuneiform tablets vs Egyptian papyrus. The cuneiform got baked and tended to last longer than decaying papyrus, which is why we have an interesting split in the kinds of records we have available to us. I’ve heard of SF stories where most information from a computer age is lost because almost none of it was stored in a permanent manner. But would, exactly, would such a permanent manner be anyway?