What is taking up all my disk space?

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I found the cause of the problem - I used a tool called SpaceSniffer. Turns out there was about 19 GB of log files in the C:\Windows\system32 folder. I have no idea why they didn't show up in Treesize or WinDirStat, but regardless of why, I found the culprit. I have now deleted those files and voilà - 22 GB free space!

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MrGordonz
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MrGordonz

Updated on September 18, 2022

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  • MrGordonz
    MrGordonz over 1 year

    I have a server (Windows Server 2008 R2 SP1), which is reporting only 2 GB free space on C drive. But when I run WinDirStat or Treesize over the disk, both of them say that only 21 G is being used out of 40 GB.

    I have run the Disk Cleanup tool to remove windows update backup files from winsxs folder.

    I tried running "vssadmin List Shadows" on a command line, and I got the following result:

    No items found that satisfy the query.

    I have made sure that System files are not hidden as well as protected OS files.

    If I am only using 21 GB out of 40 GB, I should have roughly 19 GB free space. Where is the other 17 GB? What can I do to find what is using it up?

    Windows says I have 2.13 GB free space

    And that I am using 37 GB

    But Treesize says I am only using 21 GB

    • Froggiz
      Froggiz about 9 years
      can you tel me your chkdsk result ? i have almost same trouble: serverfault.com/questions/671582/… check the "used by system" section
    • MrGordonz
      MrGordonz about 9 years
      I didn't use chkdsk. I used SpaceSniffer to find out what was using up all the disk space - it was log files in the C:\Windows\system32 folder.
  • MrGordonz
    MrGordonz over 9 years
    I am the only person who logs on to this server so it can't be deleted items for other users. Also, I changed the permissions for the folder "System Volume Information" so I could see what was in it - only 6 MB of files.
  • Spence
    Spence over 9 years
    Were you running those tools elevated ("Run as Administrator")? Not running tools like that elevated is typically the reason why they don't show complete data.
  • MrGordonz
    MrGordonz over 9 years
    That may be it - I don't think I did run those tool elevated.