I have rearranged files in our ePADD Google Drive folders as follows:
ePADD\Functional Specifications\Documentations\ - contains Glossary, Appraisal Module User Documentations, Default Labels, etc.
ePADD\Functional Specifications\Function Listing\ - contains Draft Function Listing
ePADD\Functional Specifications\Wireframe\ - contains wireframes in pdf and Balsamiq formats and related image files
Hope you can find things easier.