HT1296: iOS: How to transfer or sync content to your computerLearn about iOS: How to transfer or sync content to your computer
Currently Being ModeratedDec 6, 2012 8:47 AM (in response to Kehres19)
The normal way is to restore your PC from a backup so you have all the music on your computer and then resync with your iPhone. This way removing all from your iPhone should not be a problem.
There are ways of getting music from your iPhone to the computer but this are 3rd party software solution. You need to google for them.
Currently Being ModeratedDec 7, 2012 5:13 AM (in response to Kehres19)
This apple support communities user tip should help you. Follow the steps carefully