If you cancel your Apple Music b fire your free trial is up do you lose all the music you downloaded?
If you cancel your Apple Music before the 90 day trial do you lose your music you have downloaded?
Yes, except the music you purchased from iTunes. Once you cancel your Apple Music subscription, you don't get to keep the music you downloaded using that subscription. See this article for additional information: Manage your Apple Music subscription on your iPhone, iPad, iPod touch, Mac, PC, or Apple TV - Apple Support