This is not a solution. I've tried drag-and-drop and that will get the music into the Walkman, but that doesn't mean it will play. Some plays on the Walkman, no problem. And some raises an alarm about rights management, viz: "Cannot play. Please connect to compliant software and update license information". What's up with that, and how do I correct it? I paid for the music through iTunes. There's no "compliant software" that I'm aware of beyond the DRM features of iTunes.