Copy my iTunes songs to another hard drive as back up
I have an iMac on OS X Yosemite version 10.10.5 and would like to back up my music on a separate hard drive.
I want to leave the music resident on the iMac but have a back up in case of failure.
Thanks
iMac (20-inch Mid 2007), OS X Yosemite (10.10.5)