a unit of storage capacity, either 1,000,000,000,000,000,000 (10) or 1,152,921,504,606,846,976 (2) bytes, the latter can be unambiguously referred to by the unit name exbibyte
Definition #2 for "exabyte"
The exabyte is a multiple of the unit byte for digital information. The prefix exa indicates the sixth power of 1,000 and means 1018 in the International System of Units, and therefore 1 exabyte is one quintillion bytes. The unit symbol for the exabyte is EB. 1 EB = 1000000000000000000B = 1018bytes = 1000petabytes The exbibyte, using a binary prefix, means 10246bytes.