Well, for the disk size, Windows is still using base2 calculation. I don't quite understand why they just don't use the correct term (GiB (Gibibyte) for base2,

Well, for the disk size, Windows is still using base2 calculation. I don't quite understand why they just don't use the correct term (GiB (Gibibyte) for base2, and GB (Gigabyte) for base10) and make it user configurable. I'd prefer the base2 display, as I think it's confusing for example when exchanging USB keys with Windows machines. Furthermore OS X now is inconsistent with file size display, because not all OS X programs use base10 at the moment (for instance QuicktimeX).