If you are running a win10 computer, there is a very simple way to understand:

Open the calculator and find 'Data'

Use My Computer For example, solid state should be ?1TB, in 'Computer Management' it is ?931.50?GB

But you will see ?'TB''TiB' in the calculator

The former It is a level of 1000, and the latter is a level of 1024 (not a professional term)

So, the trademark memory and the actual memory should be: trademark? XXXGB (TB)? Approximately equal to? XXXGiB (TiB) computer display memory ( After all, the computer will use part of the memory when installing the hard disk (generally the numbers in GiB units are the same))