Geeky Friday: 124976.8 Terrabyte (TB) Hard Drive?
Obviously, the photograph is incorrect in claiming that this older pc has an 124,976TB hard drive, but when hard drive manufacturers say they are selling 160GB hard drives one would expect to be able to use the full 160GB. Sadly, this is incorrect.

Most manufactors define 1 GB as 1,000,000,000 bytes (G, Giga is 1000^3); on the other hand, computers function on base 2 (instead of base 10) and calculate the same hard drive as 1,073,741,824 bytes (Gi, Gibi is 1024^3).
Expect a 500GB external hard drive to only store ~465GiB. Why won’t a company just step up and do it right?!?
Check out this Wikipedia entry for a bit more info.