They're storing it on the moon. I think if you can manage to get to the moon, you'll be able to get a good enough microscope.
But that is the beauty of a microscope. It is not some “unrecognizable tech”. Seeing tiny things in detail is a basic skill many new civilisations can re-discover on their own. It doesn’t matter if it is our human descendants, smart octopuses or the silurians. They will be interested in seeing tiny things and thus they will construct their equivalent of microscopes.
The important thing is sign-posting. How will they know where to look?
Of course you'd want to do both (early steps, and advanced knowledge).
And there will be various kinds of low-hanging fruit, to propel newly-industrialized society into the space faring internet age. Skipping resource-wasting, fossil burning stages entirely.
As for culture (novels, music, games, software, movies, etc): who cares, whatever makes it through the bottleneck in whatever way, shape or form.