I had never used iCloud Drive with intention until yesterday when I made a tutorial as part of a promotion with a company called Finalsite. Wow - it was super easy to export something there and then access it from a website that allows a file upload. You can see my demo below (not final version) of creating some notes in EE, exporting as PDF to iCloud Drive, and then uploading to a course site on Finalsite's LMS.
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TEDxNYED: About Assessment