MiB is an attempt to disambiguate what used to be unambiguous before the hard drive companies set their marketing teams on it. Specifically, MiB is 1024^2 byte

MiB is an attempt to disambiguate what used to be unambiguous before the hard drive companies set their marketing teams on it. Specifically, MiB is 1024^2 bytes. MB is either that or 1000^2 bytes, depending on who you ask and if they're trying to sell you something.