Developers can upload documents to specific Jobs for Cloud based storage.  Vendors can login to the Vendor Portal and see all documents selected for them to see.  Some documents can be limited to a single Vendor, such as specific master agreement or scope of work agreement.  Documents are tagged when they are uploaded into categories such as 'Blueprints' 'Site Pictures' 'Permtis', etc.  This is the ideal place to store documents on Jobs.