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What's using up my disk space?

Hello! I have a 40 GB hard drive which is full in explorer (10 MB remaining). The drive is NTFS running Windows 7.

In Explorer, I go to Tools > Folder Options I select 'show hidden files and folders' I unselect all options which start with 'Hide'

In Explorer, I select all. View properties. The 'size of files on disk' is 14 GB.

So how is my 40 GB drive full? Looking for investigation vectors and recommendations.

Thanks!

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marked as duplicate by DMA57361, Mehper C. Palavuzlar, Nifle, ChrisF, Diago Sep 22 '10 at 12:06

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Looks like a possible duplicate of What's using up my disk space? - you might what to have a read of the suggestions there. Hidden system files was going to be my first suggestion. –  DMA57361 Sep 22 '10 at 7:51
    
Bare in mind unhiding, selecting and checking the size of everything visible is not accurate - it will not see files you don't have permissions for (which should be all of the System Vol folder, for example, and maybe others). –  DMA57361 Sep 22 '10 at 7:57

1 Answer 1

You may want to use something like TreeSize Free to figure out where your disk space is being consumed.

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Another tool which does a similar function is WinDirStat, I like this one because it's a single executable with no dependencies. –  Stephen Jennings Sep 22 '10 at 8:05

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