SketchUp Campus: General Feedback

Hello!
Completely new to this version of sketchup.
I am trying to follow the tutorial for beginners, and I am at the Edges and surfaces video, where they say to get the example files.
I have downloaded them, but it is not clear where to put them to get them into the web version (which I am using to learn the program).
I’d like to complete the course to see if this is something I can use for my current project, but I have to admit I am falling a bit short on how to do certain things already.

Am I missing something obvious, or are there no way to get files from your computer to the cloud service?