Transfer of songs

Transfer them to your Computer and then Sync them to your iPhone

• Mac Book Air Retina 13" macOS Catalina 10.15.1. (You may use your Windows PC too)
• iPhone SE with iOS 13.3:- Does not use iCloud Library
• iPhone 6 with iOS 12.4.4:- use iCloud Music Library

This is two a Step Process (To sync music from this computer, turn off Cloud Music Library)

1. Apple Music: Import music (MP3) to Apple Music Library on Mac
2. Finder: Sync between Apple Music on Mac and iPhone

Watch the GIF for the complete process

To sync music from this computer, turn off Cloud Music Library.

Watch the same GIF as a QT movie file uploaded by me on YouTube:- Transfer MP3 Music from Mac (Catalina) to iPhone (iOS13.3)