Save your old songs
If you want to move to a new iTunes library but first need to save your old songs, download and install iExplorer on your Mac. Connect your device via USB and it will be shown in the iExplorer sidebar. Open Media Library and select Music and you'll see a list of all the tracks currently on your device.
To transfer a selection of tracks elsewhere, select them in the central pane, click Transfer From Device, and choose whether you want them to be sent to iTunes or a folder. Alternatively, click Auto Transfer to begin the process of sending all of the music on your device to iTunes. The app will cross-reference your tracks with what's already in iTunes, and then copy across the songs and rebuild your playlists accordingly. A similar app which we recommend is AnyTrans which has a very easy-to-use interface and allows you to transfer content to and from your iOS device.
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