Wrong Used space/Free space in Explorer


  1. fyrekrig
    Posts : 19
    Windows 10147
       New #1

    Wrong Used space/Free space in Explorer


    I am using Windows10 LTSC21 (19044.1706)

    Used space/free space reported incorrectly.

    Used to run Windows10 LTSC18 and no such problems.

    Will appreciate any comment

    Wrong Used space/Free space in Explorer-001.jpgWrong Used space/Free space in Explorer-002.jpg
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  3. Callender
    Posts : 6,856
    22H2 64 Bit Pro
       New #2

    Pay no attention to that.

    Computing the size of a directory is more than just adding file sizes

    How can I find out how much disk space the WinSxS folder is really occupying?

    How come Explorer reports higher disk space used on my volume than my third party disk space tool?

    Bottom line: You cannot use File Explorer to get an exact reading on free space or space used.
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  4. Try3
    Posts : 16,966
    Windows 10 Home x64 Version 22H2 Build 19045.4170
       New #3

    Callender is spot on.

    Callender said:
    Pay no attention to that.
    ...
    Bottom line: You cannot use File Explorer to get an exact reading on free space or space used.

    Denis
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  6. mngerhold
    Posts : 1,223
    W10-Pro 22H2
       New #4

    I shall stick my neck out here: those articles by Raymond Chen highlight the issues, but he never states that Explorer gets the size of a complete partition wrong. He does state that "Explorer obtains information about used and free disk space by calling Get*Disk*Free*Space*Ex, so the information comes straight from the file system. "

    In my experience, Explorer's 'used' value for a partition matches very closely that of Wiztree, which is aware of hard links (and maybe other complications), and I am inclined to believe it. Explorer does fail when it comes to individual folders (it usually over-estimates). If the OP were to look at his C: with Wiztree, he (and I) may learn something - but I am ready to be proved wrong.

    Added: the OP might also check what Disk Management says.
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