Thanks for reaching out about this in the Community!
Currently there is no official way to store playlists in a readable text file. You can select all Ctrl+A and copy the tracks from a playlist, and if you paste those in an excel table you'd get the full list of Spotify links to the songs but you won't be able to see Artist - Song name.
There are some third-party software, which other users have used for this. You can check them out in this Thread. Note that since it's not official Spotify Software, we can't guarantee that it will work.
Hope you find this info useful 🙂
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