I was reflecting the other day that it would be interesting as I charge in my garage if I could also transfer onboard some internet radio station broadcasts for later listening, and perhaps some common mp3 files. This would also help me avoid bringing CDs into the car. A lot of this is just my laziness (I don't have an mp3 player and haven't figured out my smartphone on this matter) and so I decided to hold off on suggesting this until I'd thought about it a bit more.
Then I saw that the latest Bentley is coming with something like 64 GB of built-in onboard storage, so it got me to thinking. Maybe the Leaf already has this, or maybe it's not a good suggestion... just putting it out there.