The key concept they're missing a lot of the time is that software sits within the file system and not the other way around.
This is largely because apps hide this and data is generally stored in one place on your phone (the downloads folder).
Best way to fix it - have 1--2 lessons entirely devoted to finding shit on their computer. My favourite activity is "ok, save your word file, close word, you now have 10 mins to find that file without opening word".
Not quite - you're trying to move your sleeping and waking schedules 1 hour earlier.
It's a rough one unless you're already an early riser.
When the clocks go back, however, you're moving things 1 hour later, which is a lot easier!