Do data units in, say, the settings menu adhere to the IEC 60027-2 standard?
The IEC 60027-2 standard defines kilo-, mega-, etc. to be purely SI prefixes, and designates a series of prefixes to be used with the binary values.
So,
            Decimal                                              Binary
(kB) kilobyte     = 103 B                       (KiB) Kibibyte   = 210 B
(MB) Megabyte = 106 B                       (MiB) Mebibyte = 220 B
(GB) Gigabyte = 109 B                       (GiB) Gibibyte = 230 B
(TB) Terabyte    = 1012 B                     (TiB) Tebibyte   = 240 B
More information on IEC 60027-2 can be found here.