Workflow issue:
A large 2 GB background file is referenced in all AE projects. When you then collect the files, this large file is collected in all projects. This will overload the server's storage capacity.
Idea:
In the "Collect Files" dialog, provide an exclusion option for which file should not be collected. Add an additional path entry to automatically search for the desired file on the server, so that the large file is only stored once on the server.