- Are you sure you got the counting system right? 1 GB is not 1 GB, you know. Some people sometimes use 1GB = 10 ^ 9 instead of 1GB = 2 ^ 30 (= 2³°
), eg. HDD sellers...
120 decimal GB are only 114,44 binary GB.
- Hidden files stuff...
- If you're using FAT: Do a Scandisk / Checkdisk. Sometimes after a crash, the free space of the partition won't be displayed correctly. Scandisk fixes this quite often actually, so it seems to happen a lot. But I don't know how "serious" this is, if only a couple of bytes or more. Probably depends on how many big files were open when the computer crashed.
- When using NTFS, you've got a Folder called "Systeme Volume Information". You can't access it, but there is some indexing and security stuff written... The size of it doesn't necessarily count, but it's still used.