I set up the offline sync to the directory /mnt/sdcard/external_sd/media/spotify. After syncing up a few playlists, I can indeed listen to them offline using Spotify.
You can quickly mark a few Spotify playlists and make them available offline directly from your phone — your computer doesn't need to be on because you.
Taking your music offline is an age-old tradition, and Spotify is spitting Same with Playlists; a playlist with zero songs downloaded for offline.
Here's how to have your favorite tunes available even when you're offline, by syncing your Spotify playlists on your iPhone.
In the Spotify desktop program, head to File > New Playlist Folder or use the Try putting all of your offline playlists into one folder – then you don't have to worry.
The playlist should appear, but the songs won't be imported to the device unless you enable the Download option. This will download these.