Dropbox says my storage is full, but it is not

I think I may have figured it out. I got a new iMac, and when I setup drop box, I used Backup. After realizing I didn't have the space, I deleted backup, but for some reason it was keeping some files it had backed up. I found them accidentally when I was in the mobile app. I searched for a folder of audiobooks that I had on my desktop and deleted them. It's strange that we can't see everything eating up storage space. The only way I could see that I had something eating storage was by removing EVERY file out of dropbox and seeing how much space was being used. It said 2.6GB out of 5.75GB, but NO indication or ability to see what it was or where it was. When I searched "backup," there was a file. I deleted it, and I seem to have solved it. The confusing thing for me is that the info tab under "dropbox backup" didn't show anything and said "0 bytes," and yet dropbox was keeping it somewhere. I'm glad I stumbled on it, or I'm not sure I would have found it. Is there a way to see every file eating storage, along with the ability to remove or delete it?