Solar storm or not. It's our worry today. Perhaps they will use shovels and brushes to find a well-preserved hard drive in the frozen dirt that was preserved and recoverable. THEN they will find the steem blockchain on it. :)
If we can find dinosaur bones and eggs and fossils today. Who knows what our future ancestors will find about us?
Yes all they have to do is mine a landfill !
Oh, I hope they don't do that... all the plastic packaging that won't decompose. They'd hate our generation.