I put beforehand that I have premium spotify. In my spotify library, until a few weeks ago, I had about 1500 songs in "songs". One day, I was listening music with android but there was also my father connected with my account from pc, also listening to music. Spotify warns I was using the same account on more than one device, so it removed the offline version of all songs/playlist from my spotify account. I've tried to re-download them on my smartphone, to have them offline, but when I do it, all the songs are downloaded on my smartphone internal memory. It has never happened before. Before, I downloaded the songs and them don't take up internal memory or sd memory. How can I resolve it?