JDiskReport is an excellent free Java tool which will scan your hard drive and provide a host of useful information about how its space is being used.
This all starts by pointing the program at the folder tree you'd like it to examine, and it then spends a moment analysing your files (and only a moment, really - it's quite speedy, considering what the program has to do).
Then you see the basic report, which shows you an Explorer-type view of your folders on the left, and a pie chart on the right revealing how much each one is taking up. So immediately we could see that, for instance, the Users folder was gobbling up the most hard drive space on our test system, at 69.1GB.
Why? Clicking any folder on the pie chart allows you to drill down, and in a click or two we found that the main culprit was a VirtualBox virtual machine setup, which required 30.1GB all on its own. You'll have your own space hogs, of course, but JDiskReport should still expose them in just a few seconds.
The program does offer alternative views on your files, though. Clicking "Top 50" reveals the 50 largest files in the tree you're examining, for instance. While selecting "Types" shows you which file types are consuming the most space.
And a range of useful configuration options allow you to do everything from excluding particular folders from the report, to defining precisely how you'd like the charts to look.
Please note, JDiskReport is a Java-based tool, so you'll need Java installed before it will work.
Verdict:
JDisk is an easy-to-use and highly configurable tool which provides a host of useful details on exactly how your hard drive space is being used
Your Comments & Opinion
Find out exactly where all your valuable drive space has gone
Find out exactly where all your valuable drive space has gone
Optimise, clean and repair your PC
Find and delete duplicate files on your Mac
Quickly find and delete a host of hard drive junk
Free up space on your Mac by removing unnecessary files
Monitor, repair and speed up your PC
Thoroughly remove graphics drivers from your PC
Keep an eye on the health of all of your hard drives with this free tool
A useful hard drive benchmark
An advanced free tool for renaming large numbers of files in a flash
Preserve your desktop icon layout with this handy backup tool