sync problem
lost all my music after i checked " sync music " plz help me recover them
If it's music you have purchased from iTunes you can redownload it to iTunes on the computer, or directly on the device using the iTunes Store App. Download past purchases
If it is music you previously synced from another computer or library, you will need to re-sync with that library (you can only sync with one library at a time) or if you have those music files saved elsewhere you can import them into your current library and sync again.
iTunes: About the Add to Library, Import, and Convert functions