Troubles in uploading local files from computer to cell-phone

[Karioka17]

Hi everybody !

I've looked around on internet and on this forum but so far I haven't found anything that helps me, so I'm posting here. I have to say before anything else that I already followed all the instructions founded here, so please help me ! 🙂 https://support.spotify.com/us/using_spotify/features/listen-to-local-files/

I try to upload my local files from my computer to my cell-phone. The problem is that once on my phone I can actually only transfer some musics, not all. I followed all the instructions I found on the website, and I know a bit informatic. It's exactly the same type of files so I don't understand why it doesn't work.

I'm already on the same internet connection (my home wifi) on both devices, and I've already tried on other wifi servers but the problem is that I can only transfer something like 5 songs from my 60 musics playlist, and I don't understand why ! For instance, on the screenshot I posted, I can only read L.Y.B.B. on my phone, the other songs title are in grey and I can't read them on my phone, even when it's connected at the same moment on the same wifi than my computer....

I hope you'll be able to help me ! I join the capture of the playlist on my computer and on my phone. thanks !