Now you've really confused him!
I'll do my bit by saying that the capacity of a drive is LESS than its quoted size. My first Hard Drive that came with this A2000HD was a 52Mb Quantum that only registered as 49Mb to the system.
My second (which I recently returned to use) was a 850Mb Quantum that (after partitioning) showed as 810Mb.
My normal boot partition is on a Seagate 1.08Gb drive that shows an even 1Gb.
So those, in turn, are using 95% / 94% and 92% of designated size.
4Gb divided by 4.3Gb returns 93%.