Upload my Trainings to sharepoint

I am hoping someone can help me. I have started creating training's for my work force, but our "training site" is just a modern SharePoint communication site. After I publish the training through the Web version. I have a file folder with all the files in it, but I have no idea how to upload or put that information on SharePoint so my users can take the online course. 

Any help is appreciated. 

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