Memory & Data

I find it very ridiculous when scientists claim that the wondrous human brain practically remembers everything and has an infinite memory space...it clearly dosen't apply in my context...why do we have to do revision again and again though? Maybe the long lost petabytes of data we have accumulated over our schooling years lies within our brain's subconsciousness, but it's still seemingly useless if the majority of the human species rely more on conscious thought. Wish there was an easy way to reach that infinite limit of memory power...