Complex sentence: The prefix "exa" indicates the sixth power of 1,000 and means 10 18 in the International System of Units (SI), and therefore 1 exabyte is one quintillion bytes (short scale).
Split into simpler sentences: The prefix "exa" indicates multiplication by the sixth power of 1000 or 10 18 in the International System of Units (SI). Therefore one exabyte is one quintillion bytes (short scale).