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I have two different reports on the size of C: on Windows Server 2008 R2, by clicking the properties of C:, it shows 86.0 GB for "used space"; by selecting all contents (I have setup to view all hidden files and directories) under C:\ and viewing their properties, it shows 42.0 GB for "size".

Here we see the difference almost 44 GB while total storage is 100 GB, and we need more free space. My question is this: Where does the difference come from? and what is the solution?

Screenshot
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karel
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masoud gharibdoust
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  • @The_IT_Guy_You_Don't_Like: You know that you can edit the linkage of an image without downloading it and re-uploading it, don't you? – Scott - Слава Україні Nov 07 '15 at 10:11
  • I recently realized i could do that but you call it muscle memory or a bad habit, i can try to improve (̿▀̿ ̿Ĺ̯̿̿▀̿ ̿)̄ – clhy Nov 07 '15 at 10:18
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    Possible duplicate of [How can I visualize the file system usage on Windows?](http://superuser.com/questions/8248/how-can-i-visualize-the-file-system-usage-on-windows) – DavidPostill Nov 07 '15 at 10:49

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A percentage of your disk space is reserved for System Protection (System Restore Point) aka Volume Shadow Copy which can be account for the difference you are observing.

To find out space used and allocated for that you can run the following command

  1. Open Command Prompt as an Administrator
  2. Run vssadmin list shadowstorage

Also, File Allocation Table(FAT) or Master File Table(MFT) and Directories also take space in the computer.

clhy
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