I have lots of music on my iMac ripped from my own CDs and I have previously copied these to my iPhone to listen to in the car or with earphones. My new iPhone 16 Pro however will not allow the transfer of these non-Apple files during the setup copy procedure from my iPhone 8+. Online I have seen suggestions as to how to copy these files to my 16 but none of them will work for me including using Dropbox, despite they all clearly state that they will work with non-apple files onto a 16. I am not clever but I reckon I can read the methods they give and so I am lost. I see many expensive apps for sale but will any actually work? Please does someone have an answer worded for a nerd?