How to copy my music to my iPhone?

This is music not purchased through Apple Store. Any suggestions? I don't see anywhere to import it in iTunes.

You should be able to right click the music and select open with iTunes
Try it with an individual file (one song) instead of selecting all if the music at once

I've done it with CDs and amazon music

In itunes goto file and goto import file then goto the folder in wich you music is downloaded to and click import you should be able to select multipl by holding the ctrl key (i don't know if this is true still because i have not used itunes in a wile an they may have updated it)