Storage capacity of the human brain.

Has it been determined how much knowledge and memories can be stored in the human brain? Is there a standard of measurement used? For example, if the human brain was compared to a computer, how many gigabytes or terabytes or (fill in the blank)bytes does the average human brain hold?
Or is my question unanswerable? (I hope not)

There was a topic about this a few weeks ago IIRC. Someone gave an estimate, but its not very accurate since there is no real way to accurately compare the human brain and a computer. I tried looking for the topic without any success.

Oh, if it was discussed, I’ll try searching for it myself. It’s just something I’ve been curious about lately for some reason.