Windhawk made the size column in File Explorer finally useful.

Figuring out which directories are most troublesome without reading the drive extensively can be challenging, but TreeSize Free shows you results instantly. The explorer add-on can be launched from ...

It is free software that expands the function of Explorer and displays "folder size" on behalf of ordinary "size". It is made open source. With this, it takes time to right-click each folder to see ...

The thing is, you don't really WANT Explorer to do that, because that means it's calculating the size of folders (and all subfolders!) all the time. It will slow to a crawl. That said, I'm pretty sure ...