I have a wired issue as in below screen shot.

from within C drive, select everything and view from properties, total is around 40GB. however, if i view from "This PC", suppose to see 60GB free, but only 33GB free. where are the other 30GB?

any idea?

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Selecting all files and showing properties skips files where don't have access to. Run TreesizeFree (as admin) and look which folders "eat" most space.

enter image description here

  • thank you. TreeSize is a good software. notice that there is a hiberfil.sys file that eat up to 25 GB space. looking into see how can i remove it. – jojo Jan 6 '15 at 18:42

Thank you guys, finally i recover my disk space by disabling "hibernate" of windows 8.1, i do not need the hibernate cache, since my OS disk is a SSD, should be faster enough for a refresh boot

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