I needed an excuse to make something in Zig (this was my second project in it) and coincidentally needed a way to see my hard drive usage without waiting for Windows to calculate it.
I end up using it probably at least a few times a week so it's been useful.
Open the app, see how much disk space you have left. Click on the entries to open the disk in the file explorer.
I might pull the small internal library used here out into a library of its own but that would either be something I do because I need it elsewhere or because someone else makes a neat case for it.
If one were so inclined they could add the entire package as a dependency and
just point the package declaration at disk.zig (I think?) to use it as a lib.