Wiztree, by Antibody Software, performs space visualization and treemapping in much the same way that WinDirStat and alternatives do, but it directly parses the NTFS Master File Table, allowing it to scan and show an entire drive in just a few seconds.
It is closed-source, and free for personal use. Download here. (Note for those who have problems with moving UI elements: the donate button on the upper right wiggles occasionally and is not removable without a donation.)
this is super neat! it's shown me that star trek online of all things is somehow occupying 15,8GB of space in my drive, what the hell. I haven't had that installed in idk how long but apparently it just left a bunch of bloat behind that I never knew about

