In Spotify, you can mark selected playlists and sync them to your computer or mobile device for offline listening. Yes, you need to be online in order to sync the tracks in the first place, but after they copy over, they’re available for you to listen to, even if you don’t have a live Internet connection. Onmovies For Android
If you want to connect Spotify to your cars, maybe you need to be the premium users of Spotify. But there is another way that you can try without being premium. You just need to use the Spotify Downloader for Windows from DRmare software, then you can convert Spotify music to common audios and keep them forever. Then you can transfer the audios to your car for listening with ease.