I have a 1 TB hard drive that consists of one NTFS partition which I use to back up my data (no operating system). The size of all the data in it is : 726 GB, size on disk: 728 GB, and the used space when I check the properties is: 731 GB. There's a 5 GB difference between the size and the used space.
Why is that huge difference there?
What's the difference between these sizes? (size, size on disk, and used space)
Is there a way to calculate the difference, and be sure the HDD is not messing around?
Is that normal?