Petabyte (PB)

A Petabyte (PB) is a unit of digital information that is equal to 1,000,000,000,000,000 bytes (or 8,000,000,000,000,000 bits) and commonly used to measure the storage capacity of enterprise storage arrays and data centers. It is also used to express data transfer speeds and in the context of data storage and memory, the binary-based unit of Pebibyte (PiB) is used instead.

Summary :

Unit SymbolPB
Defined Value10^15 or 1000^5 Bytes
Value in Bits8,000,000,000,000,000
Value in Bytes1,000,000,000,000,000