Well I was never even aware of the term MiB or the others even in my training (unless I missed something lol). We were just told that there were 2 techniques used for calculating them; one correctly & the other not. So I guess in that context .. one is wrong. lol I thought the so-called KB did signify 1024 on OS systems. Which is why after formatting a HDD it gives less than the manufacuter's designated size. I think I'm lost lol.