Gigabytes, or gibibyte? Yes gibibyte is a thing.
As much as i hate to say it, but due to marketting fuckery the usage of byte has ruined it all as a 2TB drive is not 2 * 1024 * 1024 * 1024 * 8 bits but instead 2 terabit ( 2*1000000000 )
Then comes the discussion if "1KB" is 1024 bytes or if 1000 bytes is a kilobyte.
If you ask me, 1KB is 1024 bytes. If you ask the people using the kibibytes system, 1KB is 1000 bytes...
Shits fucking complex and fucked up. Cant go wrong if you say it in bits though