I'm currently downloading a show that is on a service to which I subscribe
I have a Galaxy Tab S7 and for a trip to Spain I downloaded some stuff to watch on the flight. When I got on the plane none of the stuff downloaded on Disney+ would play. Maybe an issue with downloading to the SD card? I don't know, but regardless Disney offers SD card as a download destination so they should make sure it is working.
So now I'm here pirating a show that should be available to me through a service I pay for. Gabe was right, piracy is a service problem.
Not sure if Disney+ has this issue but I sometimes leave my Netflix tablet in airplane mode when going to another country. If the show is not available in that country when connected to the internet it will not allow play back of the shows I've downloaded.