Each time I try to save a file, I get a message from my computer (with Windows 7) that asks me to free up some space in my Drive C before being able to save my intended file. But the more I search for extraneous files to delete, the more I get frustrated. I simply can't find out what "extra" file(s) I have that are occupying about 20 gigs of my C drive. As far as I know I save all the downloadable stuff to my other drives, and the most part of what I do with my computer is just Internet browsing. Would you please help me find the file or files that have occupied so much space in my Drive C so that I can remove them?