How to back up specific songs in iTunes to an external device

I want to back up the songs in a specific iTunes playlist on my computer to an external device for example a USB drive. Or perhaps even into a Google Drive folder. Not the entire library, just the specific playlist.

Ultimately, I want to then import the songs on that playlist to a second, unconnected Apple computer which also has iTunes on it. Can you tell me how to do that? Or provide me a link to easy instructions?

I am using an iMac running OS 10.12.6 Sierra and iTunes 12.8.2.3