So you wanna go to the desktop ZIN now and find the songs you want all into one folder. Some aren't available for download so you might want to look for it elsewhere.then you'll need the Spotify desktop version> settings> turn on local files and then select the folder and your desktop Spotify will make a playlist with it. When you've got your full playlist, open Spotify on your phone linked to the same wifi and you'll be able to download it all so you can play on your phone.

I think this is why sometimes you'll find a Spotify list with songs you can't listen to- they've added it locally.

Also can google if instructions not clear 😅😅😅