[jllevy123]

I had a bunch of music that I had purchased elsewhere (not on iTunes) that were previously in my library. Now that I have a new computer and resigned up for iTunes, those songs have disappeared. I happen to have them saved on my old iPhone that i no longer use. How can i transfer them to my library so I can download them onto my new iPhone?

[Just_Me_D]

Use iTunes.

https://support.apple.com/en-us/HT201593

[Tartarus]

In addition:

Connecting your iPhone to iTunes on a new computer without having the songs from your phone in it, will erase all songs from your phone if you enable music sync.

Best option for you is to enable iCloud Music Library (3 months free trial) on both your phone and i iTunes on your computer, have your songs on your phone synced to it, open iTunes and wait for them all to appear in your iTunes.

Please join our forum if you have any questions and good luck.