We — humanity, that is — created 4.4 zettabytes of data last year. This is expected to rise to 44 zettabytes by 2020. And no, I didn’t make up the word “zettabytes.” For scale, it is estimated that 42 zettabytes could store all human speech ever spoken. One zettabyte is around 250 billion DVDs — almost enough fit the whole Friends series. Read More