I've been using a Lumia 830 as a dedicated music player for a couple of weeks now. I prefer downloading and playing locally in the car, since it doesn't have a SIM card. I just got a low storage warning, despite an almost empty 64GB SD card. It's obvious Spotify is storing downloads on the phone, but I can't find exactly where it's going. My phone is set to store everything, music included, on the SD card. Is there a setting in the Spotify app to control this? I'm really trying to justify my continued use of a WP, but it's getting harder daily.