An Exabyte (EB) is just a big product of computer data storage, two towards the sixtieth power bytes. The prefix exa means one quintillion, which is really a decimal expression, or one billion.
Two for the sixtieth power is clearly significantly, or 1,152,921,504,606,846,976 bytes in decimal over a quintillion (or five towards the eighteenth power) bytes.
In 2013, Randall Munroe compiled published assertions about Google’s data centers, and estimated that the company has about 10 exabytes stored on disk, and additionally approximately 5 exabytes on tape backup. The company has refused to comment on Munroe’s estimate.
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The hard disk was invented on September 13, 1956 by IBM team led by Rey Johnson (considered as “father” of the disk drive). Earlier hard disk drives were large and cumbersome devices.