I was looking for a disk analyser that could give me a comprehensive over view of my disk usage, in terms of file types, folders etc... and I came across Xinorbis. It is a free piece of software available for download from: http://www.freshney.org/xinorbis/. Once installed I ran it on my Data Drive where all my downloads go, files, and general dumping ground. and I have to say I was impressed with the report I got.
If you are looking for something just to do a scan of your HDD Usage then I would recommend this piece of software, as the graphs and reports you get are very comprehensive.
