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Windows Server 2008 R2 hidden and/or missing files, drive misreporting used size

I have a Windows server 2008 R2 OS.
The data drive (E:) is partitioned into a 500GB hard drive (RAID1).
If you right click on the drive and look at the properties it shows 458GB used and 30GB free.
However, if you select all files and folders (yes, even hidden and system files) it only reports about 200GB used.
Ran chkdsk, scandisk, etc. but did not help.
I ran 2 different hard drive utilities to find the hidden files:  Windirstat and Foldersize.
Both of these program report that only 200GB is being used.
I have included screenshots in this attachment

This is driving me crazy.
2 Solutions
Farhan KaziSystems EngineerCommented:
May be that volume contains Volume Shadow Copies. To verify open command line with elevated privileges (Run as Administrator) and apply following command.

VSSAdmin List Shadows

If there will be any shadows it will list all.
To see storage occupied by these shadows apply following command:

VSSAdmin List ShadowStorage

To delete shadow copies use DiskShadow command.

Hope this helps!
steveobryanAuthor Commented:
Here is the screen shot from running the commands above.  Doesn't seem to be the issue.  I think shadow copy is disabled.
If you want to see what is going on, get a USB stick and go to ubuntu.com and see how to make a bootable LINUX stick.  Then boot to that stick.  It will let you look at everything, in a safe read-only mount.

Nothing will be hidden and you will be able to see exactly what files and partitions exist.
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Shahnawaz AhmedTechnical Services SpecialistCommented:
Hello steveobryan,

you might need to use Treesize prefessinonal. Please try that you will get all the information where your free space is going.

@ Admin : I am sorry that i am responding on this question here because unable to post anything at http://www.experts-exchange.com/R_15505.html
without more info we can only offer guesses, but My first punt would be that you have roaming profiles or redirected folders on the drive?
I suspect you simply dont have access to all the folders/files and therefore cannot include everything in the filesize. This is normal as these types of folder are exclusive to the user by default.
Seth SimmonsSr. Systems AdministratorCommented:
I've requested that this question be deleted for the following reason:

Not enough information to confirm an answer.
Points should be rewarded equally to all experts who responded.  The user wanted to know what the hidden files were, and all responses revealed techniques to display them.  Asked and answered.
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