Q: how to return downloaded songs or albums to the cloud - to conserve space on a device

Hi there,

From your post I understand that you'd like to delete music from your iTunes library in order to save space.  To accomplish this, please follow the directions in the article below based on the device you are using.

How to delete content you've downloaded from the iTunes Store, App Store, iBooks Store, or Mac App Store - Apple Support

Thanks for using the Apple Support Communities!

Cheers,

Alex H.