Use Apple Music and sync your library
Open the Music app on your iPhone
Sign in with your Apple ID
Subscribe to Apple Music if needed
Turn on Sync Library in Settings
Add songs to your library from Apple Music
Download songs for offline listening if desired
Use iTunes or Finder on a computer
Connect your iPhone to the computer with a cable
Open Finder on Mac or iTunes on Windows
Select your iPhone
Drag music files into the Music app or sync them
Click Sync or Apply
Use AirDrop to send music from another Apple device
Accept the files on your iPhone
Save the music to the Files app if supported
Use a third-party music app that supports file import
Import local music files into that app
Transfer music from cloud storage apps
Download the files to your iPhone
Make sure the music is in a compatible format