What is Data Volume?
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One petabyte is equal to 1,000 Terabytes, which makes it an extremely large unit of measurement for digital data volume.
The "peta" in petabyte represents "to the fifth" power, where 1,000 ^ 5 = 1,000 x 1,000 x 1,000 x 1,000 x 1,000 = 1,000,000,000,000,000 bytes
One petabyte is equal to one quadrillion bytes, which is 1 million gigabytes, or 1,000 terabytes. Some estimates hold that a Petabyte is the equivalent of 20 million tall filing cabinets or 500 billion pages of standard printed text.
An exabyte is an even larger order of magnitude above a petabyte: 1,000 petabytes.