Q: How do I add audio MP3 from my Mac to my iPhone

I was doing that. I connect my phone with the USB port. Then open iTunes.

I tried  to drag and drop the MP3's to my phone individually.

I then created and set them up in a Playlist. The playlist is in my menu bar but when I go to manually sync my iPhone to my laptop iTunes the new playlist doesn't even show up in the playlist options to sync.

I tried to drag and drop the playlist on my iPhone.

I checked to see if they were really MP3's and they are.

Out of options now.

I used to able to do this before. But now I can't. I also notice all the other audio MP3's I used to have in playlists I created are now gone. Sigh