So I work at a school these days, fixing their computer problems and what not. I was fixing up a computer today to get it ready for the beginning of the year, and decided to run ATF cleaner. The computer has a 75-80 gb hard drive, and before I ran the cleaner, it had about 20 gb of free space. After I ran the cleaner, it had about 54 gb of free space. Here is the screen shot:
So for those of you who do similar things, if you use ATF cleaner, and your results are pretty high, feel free to post them here as well