The “brilliant” marketing gurus at data storage companies decided early on that all their products should be marketed in the decimal system, since that’s what consumers understand.
Here you are also losing a considerable amount of disk space. But your OS may consider it as 1 KB = 1024 KB. Computers, on the other hand, think in base 2, the binary numeral system. They consider 1 KB = 1000 Bytes.
