Zetta is a Prefix which has value of 10 raise to the power of 21. Zetta Byte is the largest unit of memory used in computers. 1 ZB = 1000000000000000000000bytes = 10007bytes = 1021bytes = 1000exabytes = 1 billion terabytes.The unit symbol is ZB.
As of 2013, the World Wide Web is estimated to have reached 4 Zettabytes
Research from the University of California, San Diego reports that in 2008, Americans consumed 3.6 zettabytes of information.
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