I have a 250 GB SSD installed as my primary disc on which I have Win 10 installed. I just recently realized that the explorer overview & the windows disc property dialog stated, that there are 200 GB used & only 31 GB free on that disk.
Since I was curious on where that much used space came from, I started the free application WinDirStat which told me that there were only 62 GB used on C.
Also if I select everything under C with hidden files & system folders shown in the explorer, the properties dialog states that those are only 62,5 GB in sum.
Where do the 200 GB used space come from which are shown in the disc overview?
Answer
Selecting all files and showing properties skips files where your user accound doesn't have access to while showing the disk pproperties reads the NTFS meta data and always shows the correct usage.
Run TreesizeFree (as admin) to see a better view of the disk space usage. Running as admin shows hidden folder like System Volume Information where system restore points and chkdsk logs are stored.
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