What's Eating Up My Cloud Storage?

I searched all over the forums and didn't find anything to help.

My Creative Cloud says I've used up 13 of my 20 GB storage.  I'm syncing a few photos across devices, but nothing remotely close to that amount, maybe 100 MB tops.  I clicked on View on Web, cleaned my archive.  Now it says NO files, but still using 13 GB.  Should I be checking something else?