I'm a fan of WinDirStat. Yes it can be slow, but it runs on darn near every Win OS, hasn't changed in years, is a small executable, and the site always seems av

I'm a fan of WinDirStat. Yes it can be slow, but it runs on darn near every Win OS, hasn't changed in years, is a small executable, and the site always seems available. I used it many times to solve disk space issues on the job.