Not sure what to make of that comment :/
Its great. Its breaks down data type by folder... So I can see where all the space is being used.
So lets look at mine.
On the left "Storage card" is my internal /sdcard. It shows the size in total.
We can see that 6218 MB of my data is "media" and 1685 MB is "apps" from the second column.
When we move into the 3rd column, We can see which directories have all the data in. So it breaks "media" from column 2 into folders. We can see that "AFlash" folder and "clockworkmod" folder take up the most space (in column 3). We can also see that my biggest "app" killer is "Virtua Tennis"
Every column to the right of column 3 shows even more folders (within the folders). The brown blocks are individual files.
You should definitely and easily track down your culprit this way.