You can manage your music using iTunes easily. I think you might be referring to Apple Music which is cloud based and you primarily use it from your phone.
In any case load iTunes on your computer, point it to your song library, sync the library to your phone by plugging it in and bobs your uncle.
For more details: https://support.apple.com/en-ca/HT201253
__________________
"In theory, there is no difference between theory and practice. But in practice, there is" — Jan Van De Snepscheu
|