disk usage? Vista Enterprise

[Terrier_Jimlad]

Can anyone explain this for me? I have a 160GB VelociRaptor, and when you right click on my C:\ and goto properties it says 66.1GB used space ... however, when you run TreeSize (a free file size app) it shows as only 43GB used, which is confirmed when you right click each folder individually

Somewhere, 23GB is being used ... any ideas?

 

[Terrier_Jimlad]

what's to look at? It's a single 149GB NTFS partition

SystemRestore is disabled ... I wouldn't have thought page file and a few other bits would be 23GB worth? seems very excessive!

 

[Terrier_Jimlad]

nanobot, seems your command has confirmed where my 23GB has gone:

C:\Windows\system32>vssadmin list shadowstorage
vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool
(C) Copyright 2001-2005 Microsoft Corp.

Shadow Copy Storage association
   For volume: (C:)\\?\Volume{f4d80f78-7f47-11dd-a731-806e6f6e6963}\
   Shadow Copy Storage volume: (C:)\\?\Volume{f4d80f78-7f47-11dd-a731-806e6f6e69
63}\
   Used Shadow Copy Storage space: 21.311 GB
   Allocated Shadow Copy Storage space: 22.064 GB
   Maximum Shadow Copy Storage space: 22.351 GB


C:\Windows\system32>

What is it actually shadow copying? Is this for SystemRestore purposes?