Yep! Our long-term memories can store almost the entire internet as it was in 2016 inside it!

See here for a reference for that: https://www.livescience.com/53751-brain-could-store-internet...

Or this article we wrote also talks about it: https://saveall.ai/blog/learning-is-remembering

So there is a theroetical point at which your brain will get "full" but it would take so much knowledge to do that that it's basically impossible.