I actually found this really small and old freeware that still works. A bit buggy but works pretty well for being such an old application. It's called Scanner. It's portable too. Not sure if it's as fast but the graphics representation is the easiest for me so far.
Never liked it. I hate the square layout of it.
I have used Stefan Gerlach's Scanner tool for the past decade--which doesn't require an install and is only 156kb.
http://www.steffengerlach.de/freeware/
It's a much easier and better tool, IMO and makes me really friggin' hate WinDirStat.
Use a program like Scanner or WinDirStat to get a visual representation of what stuff is taking up space where on the drive, then figure out what gets the most bang for your buck by being deleted. If you're not sure if you can safely delete a particular thing, then call your buddy and ask.
I looked up DiskFan and found a bunch of ceiling fan stuff, including an Android App for ceiling fans... but Scanner/Scanner2 is great for quick, light cleanup with a piechart/sunburst chart. I've used it to find things like overfilled temp and cache folders or hibernation files on people's PCs.
I think the best place to start is determining what/who is taking up all that space. Run Scanner and see where the largest portion of the data is. Once you figure out if its a program or a windows file, it'll be easier to proceed.
I have always preferred the info in pie chart form. Currently I use Disk Space Fan. I used Scanner for a long time.
Any chance you have software from Senheisser installed? If not, download and run Scanner. Select the C drive on the left. Then let it run. It will make a nice chart, with each zone representing every folder and how big it is. You can click on them to go deeper. That should lead you to the root cause.
> Are there any good tools out there that can help identify and cleanup whatever is causing this?
Only a few:
Treesize Free
Disk Space Fan (free or paid)
Glary Disk Explorer
Space Sniffer
Overdisk
WindirStat
JDiskReport
I'm propably way too late for this one, but Scanner.
What it does is scan a hard drive or folder of your choice and return a nice multilayer pie chart that shows exactly, which folders contain the most data.
This thing is great if you want to clean up your hard drive.
Never used Diskpacefan, but Scanner does something similar. It shows multilayer pie charts corresponding to different levels of subdirectories. Best of all, it needs no installation.
Ditto, I've gone through WinDirStat, TreePie, Overdisk, and Scanner. It's easy to find the big files with WinDirStat, but I have a hard time reading it for directory sizes vs the pie chart method. TreePie and Overdisk are sort of in the same bucket, with me primarily using Scanner.
Looks like Disk Space Fan is the best utility in terms of UI (all the other utilities look 90's era) with decent performance. I just wish I could run it in portable mode.
On a side note, I prefer KDE's FileLight over Gnome's Baobab on Linux systems despite running Gnome. Due to Baobab's recursive nature, it takes forever to run even on an SSD where FileLight is nearly instantaneous.