How are these SCORM packages downloaded from the LMS?

Hi NeilForrest-ea7!

Happy to share more insight on this!

Every LMS should load course content as the learner progresses, on a lesson by lesson basis. For Rise and Storyline, there is first an initial bit of data that must be loaded so the course can build the navigation structure, and know what each lesson is titled. There will be a small burst of data that gets sent upon launching the course, then as the learner moves through each lesson, the contents of those subsequent lessons are loaded. This is why larger courses may take more processing time to load within an LMS.

However, Storyline specifically can get a little more complex with how content is loaded, and is conditional to how the author designed the course. A Storyline author could theoretically dump an entire course's worth of content into a single slide, causing everything to be loaded when the course first launches. Or the author could split that content evenly among multiple slides, which will load as the learner navigates through them sequentially. 

Hope this helps!