Human brain can do wonders

I happened to come across this Kid speaking 10 languages.

Which pops up following questions to me:

What is the amount of data that can be stored in a human brain?

Is information realy stored in brain (neurons) or somewhere else?

If brain capacity is limited, is there any compression logic being used by the brain to store so much of information?

Well, I think it would be a long time before Science can answer such questions.