The mebibyte is a multiple of the unit byte for digital information.
From the en.wikipedia.org
Megabyte is ambiguous, but familiar, mebibyte is unambiguous but unfamiliar, thus neither is optimal.
From the en.wikipedia.org
The unit symbol for the mebibyte is MiB.
From the en.wikipedia.org
Mebibyte is not commonly used.
From the en.wikipedia.org
More examples
Megabyte: a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
The mebibyte is a multiple of the unit byte for quantities of digital information. The binary prefix mebi means 220, therefore 1 mebibyte is . The unit symbol for the mebibyte is MiB. ...
One million, forty eight thousand, five hundred and seventy six (1,048,576) bytes