I was just watching Spongebob, and it the episode where he has to erase all is memory except for knowing how to cook and cater for Squidwards fake restaurant.

Anyways theres a scene where in his brain theres a metephor where a bunch of small Spongebobs in an office with a a stash of drawers full of paper and they start trashing everything.

My question is, is the subconscious a data bank of all previous memories and experiences of a person?

Can you dig into previous memories which you consciously forget in a lucid dream?