What is a HiFi Walker 2? What does it have to do with a Sonos system?

Ah, I think I misinterpreted your post, on first read. My apologies. I think you’re asking about downloading a Sonos Playlist. There is no way to do so within the Sonos app, but my understanding is that there are third party controllers for Sonos that allow you to do so.

You might want to look at the forum information about @controlav, I believe his software allows this.