Zoho Project Document Management

Zoho Project Document Management

Where in the world does one go about managing all the the documents within Zoho Projects?

I have been using Zoho Projects for about a year now. 45 projects later (some archived and some active) I now have a lot of documents that need clearing up. Because Zoho Projects is a beautiful piece of software, you would think finding the place to see the amount of storage used and mass delete files would be as easy to find and use as everything else in Zoho Projects. Is this not the case managing the admin section?

Can someone point me in the right direction please?