Hi everyone ,sorry for the daft question but im totally lost use a iMac with external hard drive for music files and iPhone 10 previously just put music from my hard drive on my phone never any problem decided to try apple music , since then ive lost the ability to sync music from my HD onto phone .....so i cancelled apple music ...but when i plug in phone and go to sync settings it tells me i must turn off cloud music library and my files aren't available .......im lost please someone help LOL