App just syncs half of my local files

[DustinEssmann]

I did everything as shown on the Website, but the app just stops the sync-process halfway through.

My playlist is:
- 100% .mp3 and not corrupted

- playable on my desktop

- syncing some songs but then stops

- not showing the songs that are not synced, it just stops

Of course I'm in the same WLAN (otherwise it wouldnt sync at all). The errormessage when it stops says "you dont have anough space", but there are ~40GB free and I can sync as much songs as i want when im not putting the local files in there. The songs are from the same album and are just like 500MB. Moreover the playlist is in private and not shared. I have like 50 songs downloaded on my Phone, 0 on my desktop.

App, System and Desktopapp are in the newest version. WLAN is stable. iPhone 6S. I already tried everything from the "spotify answers" forum on the Local Files topic. Nothing changed.

I'm totally confused since I never had problems with this before. Any help?

[user-removed]

Hello, Help arrive!
If you are experiencing:
A. Grey title in Playlist
B. Cannot play mp3/m4a on iPhone

Please make sure the songs import into Spotify:
a. Not protected by DRM
b.In supported format (https://support.spotify.com/us/using_spotify/features/listen-to-local-files/)

Steps:
1.Make sure your computer and mobile devices (iPhone) in the same WiFi network.
2.Remove the playlist which you find the problem
3.Remove and re-add the "Local Sources" - Make sure all songs synced.
3.1 Reopen Spotify app (MAC) [in case if you added too many songs] [Recommend to do]
4.Make sure all the songs which added can be played in Spotify (Mac)
5.Make whole new playlists (Recommend using different name from preventing sync error)
6.On Mac, check all the songs in playlist whether they can be played or not.
7.Download playlist on your devices(iPhone)

Please let me know if you have any questions.