Copy the folder username/Music/iTunes
and paste into hard drive.
Then if you want to use this hold down the option key while starting iTunes
Select choose library and point it at your external hard drive
Here is the Apple Article
so I have transferred the music to the external drive
You transferred the music or the entire /iTunes/ folder?
how do I tell it to look at the external drive to play the music?
Steve noted how to do it in his previous post (6 months ago).
- Hold Option and launch iTunes.
- Select Choose library...
- and select the iTunes folder on the external