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An exabyte (EB) is a unit of measurement for data equal to 1000 petabytes (PB) or a million trillion (1,000,000,000,000,000,000) bytes. An exabyte is large enough that it would take about 250,000 high-end home computers or 1,000,000 average home computers to store this amount of data.

One thousand exabytes make one zettabyte. The largest file currently known (excluding zip bombs) is the CERN Large Hadron Collider (LHC) dataset, and that is only 2 petabytes.