of 1024. [ edit ] Comparisons for scale A zettabyte is equal to 1 billion terabytes. The world’s technological capacity to receive information through one-way  broadcast  networks was 0.432 zettabytes of (optimally compressed) information in 1986, 0.715 in 1993, 1.2 in 2000, and 1.9 (optimally compressed) zettabytes in 2007 (this is