why do all drives have less space than actually said?

Question

i have seen drives like a 2tb on that i have but it only has 1.81 tb. i have a 512gb one and it only has like 495gb. why is this?

edit: typo

In: Technology

Answer 1

There’s some space taken up by the file system to record what files are where. So it’ll always be less than advertised. But if you’re actually seeing 17BG gone, that might be a problem.