Look, I've seen the sticky, saw 100's of replies from people with the same or similar problems, and one reply marked as "Solution", which is just NOT the solution.
So how do i get my offline playlists back? The songs are all there on my sd card, the playlists are there, just not available offline anymore. And i don't want to download them again, as the data are already on my sd card. I have the latest version installed on my S4.
Why is Spotify not reading the data anymore?
Solved! Go to Solution.
Sorry to say I think the best option is going to be to delete your cache and saved data and redownload the playlists. I also have an S4 and actually managed to break the connection between the app and the data on the SD just yesterday, and resetting it did the trick.