Wiktionary
yottabyte
n. (context computing English) One septillion (1024) bytes. SI symbol: YB.
Wikipedia
Yottabyte
The yottabyte is a multiple of the unit byte for digital information. The prefix yotta indicates multiplication by the eighth power of 1000 or 10 in the International System of Units (SI), and therefore one yottabyte is one septillion (one long scale quadrillion) bytes. The unit symbol for the yottabyte is YB.
1 YB = = = = =A related unit, the yobibyte (YiB), using a binary prefix, is equal to .
Usage examples of "yottabyte".
Its capacity was most meaningfully expressed not in giga-, tera-, peta-, exa-, or even zettabytes, but in yottabytes, or sextillions of bytes.