What is bigger: MiB or MB?

A mebibyte is a unit of measure. It represents 1024 * 1024 bytes. A mebibyte (a contraction of mega binary byte) is a unit of information or computer storage, symbol MiB. 1 MiB = 1,048,576 bytes = 1,024 kibibytes A megabyte (MB) is a large number used when talking about hard drives or computer memory. One megabyte is 1 million bytes or 1 thousand kilobytes. Until December 1998, when the International Electrotechnical Commission (IEC) first defined a mebibyte as 1,048,576 bytes, megabyte also meant either 1,048,576 bytes, or 1,024,000 bytes. Casual computer users still often use megabyte to mean one of these numbers. So, the correct answer is MiB.