How does adding and linking files work?
When you add or link files to a course, you can either upload new files or reuse existing ones from the Documents feature. Adding a file allows you to upload training materials that are specific to a course, such as reference guides, and store them directly in Documents. Linking a file lets you reuse existing manuals, procedures, or policies from Documents without uploading them again.
By managing files in Documents, this helps teams keep training materials consistent across courses, as updates apply wherever the file is used. It also reduces duplication and ensures users always see the most current materials as they move through a course.
What you'll need
You can only link files from the Documents feature that you have access to.
Add or link files to a course
Select Training in the sidebar or select it in More.
If you're on the "Learn" page, click Content at the top of the page and select Courses.
Create a new course or click View or Edit on an existing one.
If you're editing an existing course and it's published, click Edit on the upper-right of the page.
Click on the upper-left and select Standard.
Click New slide on the left-hand side of the page.
In the pop-up window, click File and select Add file.
Click Browse in the "File" section on the right-hand side panel to select files.
In the pop-up window, choose whether to link an existing file from Documents or upload a new one:
To link a file: Click Link,then select the file you want to link from Documents.
To upload a file: Click Upload, then drag your file or click browse to select it from your device. Select a folder from the dropdown, or create a new one, to save your file in Documents. Then, click Save here.
Once you're ready, click Add file.

You can upload files up to 100MB in PDF, DOCX, DOC, XLS, and XLSX formats.