Normally, when you first time install the Spotify app successfully on your computer, the program will automatically search and sync locally stored music, during this period, it will scan your hard drive for iTunes tracks and playlists you’ve created. However, iTunes and Spotify don’t always sync up; for example, iTunes has the ability to create automated playlists based on certain criteria, but these playlists don’t copy over to Spotify. If you have some iTunes playlists that can't be imported to Spotify automatically, you can try the following method to manually copy these playlists over to Spotify.
Open iTunes, head to Preferences, then select Advanced, and tick Share iTunes Library XML with other applications.
Here we take a playlist named 22 on iTunes for example.
After open Spotify, click on File on the menu bar. Slect Import Playlists form the drop-down menu, then click iTunes.
Wait a couple of minutes, depends on the amount of your playlists, all your iTunes Playlists will be added under the folder named iTunes.
If you are also looking for a way to be able to play Spotify music or "local Spotify files" from your desktop to Android device without downloading Spotify, there is a very useful Spotify Music Converter to help you solve the above problems. Spotify Music Converter which is an awesome Spotify Music downloader assists you to directly remove DRM from Spotify Music or Spotify playlist and convert to MP3/ AAC/ WAV/ FLAC, so that you can use Spotify music more efficiently. After conversion, all your ID3 tags would be kept successfully.
Note: The trial version of Sidify music converter for Spotify allows 3 minutes conversion. You can purchase the full version to unlock the time limitation.