WinDirStat (also available on SourceForge) is a disk usage statistics viewer and cleanup tool for various versions of Microsoft Windows. It's not fast, but it looks cool. When you first launch it, there are little Pac-Men going back and forth, 'gathering' the stats. As you can see in the upper-right, the files are color-coded by type. I've been using WinDirStat for over a decade!
Each rectangle represents a file, with its size being 'to scale' with respect to the others. You can't see my cursor, but it's hovering over one of the red rectangles near the center of the whole thing. Anyway, if you look in the lower-left corner, you can see the name and location of the file it represents, which in this case is the movie, The Muppets, in MP4 format.
In the screenshot below (C-Drive only), I have selected that monster purple rectangle, and can see it's my hiberfil.sys file (for when your system Hibernates). I find it a fun way to discover huge files you may not need.