Can someone advice please. At the moment I do not have a Apple Watch so I cannot try this, I am awaiting delivery on a series 5 having sold my series 3. My iPhone XS Max is getting a little short of space (64GBs). The series 5 has, I believe, 32GBs of storage, enough for all my music. If I were to put all my music on the watch and remove it from the iPhone would it still stay on the watch or would it disappear? I only use Bluetooth headphones and connect to my car radio via Bluetooth so listening would not ba a problem.