xPort functions very simple: you connect the iOS device to the computer, wait for a few seconds while it synchronizes and when it's done you start to export all your music to the interior of the hard disk.
In this transfer you will not only keep all your songs, but you will also preserve the number of times you have played each song, the covers of the disks or the qualifications you have made. Even the podcasts will be perfectly saved.
The interface of the program, very similar to the one of any native application of Apple, will let you work quickly with your songs, choosing the ones you want to play in a matter of seconds.
xPort is a fairly useful tool if the problem mentioned in the first paragraph happens to you. But even if nothing happens it can be of great help to manage your iTunes.