exabyte

1. (computing) One quintillion (10¹⁸, or 1,000,000,000,000,000,000) bytes or 1,000 petabytes.Examples: "Altogether, the human brain is estimated to hold something in the order of 200 exabytes of information."; "North American cloud traffic in 2015 measured 1.891 exabytes per year, in the Asia Pacific 908 exabytes per year, […]"; "In 2010, Google's CEO, Eric Schmidt, stated: “There were 5 Exabytes of information created between the dawn of civilization through 2003, but that much information is now created every 2 days” (Schmidt, 2010). Schmidt's forecast, indeed, proved to be an underestimation."

2. (computing, informal) An exbibyte.informal