petabytes

/P EH1 T AH0 B AY0 T S/
noun
  1. 1

    (SI) One quadrillion (1015, or 1,000,000,000,000,000) bytes. SI symbol: PB.

  2. 2

    1,125,899,906,842,624 bytes or 10245, or 250. This capacity may be expressed unambiguously as a pebibyte. SI symbol: PiB, computing symbol: PB.

Source: https://en.wiktionary.org/wiki/petabyte, https://en.wiktionary.org/wiki/petabytes