Just a reminder to make sure you select the option to download the playlists or make them available for offline listening, otherwise you’d have to be on WiFi or use data to stream the music. If it’s downloaded to your device for offline listening it will be saved into your device’s available storage and you can play the music without data connection. This is what I do because I don’t have WiFi or use my cell phone data in the islands, I’ll just save it before leaving home. You can always undo it after your travels if you need that storage space back.