A study, published in the journal Science, calculates the amount of data stored in the world by 2007 as 295 exabytes.
exabyte is 10 ^ 18 bytes or one million terabytes petabyte is 10 ^ 15 bytes or one thousand terabytes terabyte is 10 ^ 12 bytes or one thousand gigabytes or one thousand slightly compressed full length DVD quality video movies
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