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  • Free space and used space adds up? 368+162=540?
    – Moab
    Commented Aug 29, 2016 at 0:04
  • Used space is 378 and free space is 162, so it adds up to 540. So the total is correct. But the used space is not correct.
    – rcs
    Commented Aug 29, 2016 at 0:18
  • 1
    There are hidden files that never show up using properties.... superuser.com/questions/212647/…
    – Moab
    Commented Aug 29, 2016 at 0:24
  • If you look at the 3rd screenshot the checkbox for hidden has a square instead of a tick mark: that means not all hidden files are counted. Some are omitted, I'm not sure which ones but seems like a lot. What the show hidden files option does is display them in your file explorer, and does not necessarily count the in the adding up of used space. Try bringing up the dialog on the 3rd screenshot after launching explorer.exe as administrator. But I do not think it's designed to be an accurate measurement of all filed on disk.
    – user628797
    Commented Aug 29, 2016 at 0:27
  • 1
    The cause for mis-representation of file storage usage is security - "Run as Administrator" is required for the 3rd-party applications to access folders you can't measure without this privilege.
    – Alocyte
    Commented Dec 10, 2020 at 12:25