The prefix exa indicates multiplication by the sixth power of 1000 (1018) in the International System of Units (SI). Therefore, one exabyte is one quintillion bytes (short scale). The symbol for the exabyte is EB. An exabyte (EB) is a unit of digital information storage used to denote the size of data. It is equivalent to 1 billion gigabytes (GB), 1,000 petabytes (PB) or 1,000,000,000,000,000,000 bytes (B).