Hello guys , my Drive C which is an NVMe SSD is 413GB and as you can see in image below when i calculate the whole drive it shows its about 400GB full but when I calculate all of the files and folders inside the drive (even hidden ones) it shows 200GB so where the hell is other 200 GB ??!!!
You do not have all files/folders selected plus your user will not have access to viewing all the files (you currently do not see operating system protected files). Files, that your current user can not view/access, will not be counted, when determining size of selected files.
Hint - check System Restore points, hiberfile.sys, pagefile.sys .