Like many other users, we don't add documents to Workfront, but add the link to the source file. In our case this may be Sharepoint, Teams, Shared Drives and occasionally Google Docs.
There is currently no central place to store document links so we put them in the updates, which means having to route back through the list to find them. It would be really useful to have a 'document links' section in the left hand panel to hold the links for all documents relating to that project or task for quick reference.
