You can add articles to your shared library in a few ways:
1. Select PDFs from your desktop (or an export file from another reference manager).
Screenshot showing how to select PDFs to import into ReadCube Papers Shared Library

2. Drag and drop files into the browser window. Just make sure you have the folder selected that you want to add those articles to.

Screenshot showing how to drag and drop PDFs to import into ReadCube Papers Shared Library

3. Add articles from your personal library by selecting one or more and dragging them on top of a shared group library.

Screenshot of a ReadCube Papers Shared Library

Screenshot showing how to include annotations in a ReadCube Papers Shared Library

Once those article are in a shared library, all team members who have been added to that particular shared library will have access.