Ethics of Owning Music

So I was recently working on my homework and I stumbled upon an interesting question regarding the ethics legality of owning and sharing of music either through CD or even digital downloads. What's your opinion?

Screen Saver on macOS

The screen saver, a series of images that appear on your screen once it goes to sleep, can add a little bit of design to your sleep screen instead of your typical black screen. You can change what images appear and how they appear.