Do you have and use WD SmartWare? If you do you can use it to backup your music to the public folder. See the images below. First you would want to set it up to backup to your Public folder.
After choosing the Public folder as shown above then click on the Backup tab. If all you want to have backed up to the Public folder is your music then under Advanced View select music and uncheck all the others. See image below.
Once this is setup and backed up be sure to choose the Backup Frequency you want to use.
Have you looked at and thought about using the iTunes server? The following comes from the WD My Cloud User Manual.
To enable or disable iTunes: 1. To enable iTunes to access your music files through your iTunes player, click the iTunes Server toggle switch as appropriate: ON : Allows access (default setting) OFF : Denies access 2. Click Rescan to update your media files. When the “iTunes rescan has been initiated” message displays, click OK .
See the Dashboard>Settings>Media.
