Try reading critically. To process 1 yottabyte of data assuming you have 128 bit registers you would need 100,000,000 petaflops.(See http://www.wolframalpha.com/input/?i=%2810%5E24+bytes+%2F+12...) Therefore, there must be a great deal of preprocessing using classifiers to basically eliminate a great deal of useless information. Just because you store it doesn't mean you will listen to it.