Good!

This is good - I knew I had about 40GB somewhere taking up space, but I just couldn’t figure out where it was. Disk Diag found all the “large files” and I discovered it was rendering previews from old video editing projects that were taking up all the space. So for $0.99 I am very happy with this software. It was very fast, too, in both its analysis and its cleaning.

Gwitty about Disk Diag, v1.2