Hello Jaqueline,
Happy to help!
If you attach a resource from a file in Storyline 360, a copy of it should get added to the course, meaning if you share this project file with other authors, the resource should still be available.
I've attached a sample project file with a PDF added as a resource. Please open it, publish the course, and let me know if you can access the PDF in the published output.
If you are experiencing something different, would you mind sharing more details on how you're linking resources to your course? Are you adding web URLs instead of uploading files? Additionally, would you be willing to share a copy of your project file here or in private by opening a support case so we can check how you've added the resources to the file? We'll delete it when we're done testing!
