Play Tracks in Spotify without a Web Connection
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.
You can sync a whopping 3,333 tracks — that’s about six days’ worth of music. These tracks can be made available on up to three computers or mobile devices.
Because you need to have a current Premium subscription in order to use this feature, you need to connect to Spotify at least once every 30 days with the device that’s storing the offline tracks in order to keep them there.
Music synced for offline listening is playable only from within Spotify apps. You can’t, for instance, open iTunes and play these tracks or transfer them to incompatible devices, such as iPods (you can sync only local tracks you already own onto iPods, not tracks from Spotify’s streaming library).
They are all in encrypted form and stored in your Spotify cache. A Spotify subscription gives you the right to rent the music, but not to own it. For that, you need to buy the track as an MP3 download.