1.Connect iPhone to computer, go to my computer n double click iPhone drive, choose tools > Folder Options> View > select Show Hidden Files & Foldersand click OK
2.now right click iPhone Control folder> select Properties> un-select Hidden and click OK > select Apply Changes To This Folder, Subfolder And Files and click OK .
3.Next, click iPhone Control folder and open Music , did u see folders labeled F00, F01, F02, F03
? Now Place iTunes side by side w/ this window and make sure that Music Library is displayed.
4.In iTunes select Edit > Preferences>Advanced, and put a check next to: Keep iTunes Music Folder Organized &Copy Files To iTunes Music Folder When Adding To Library, click OK.
5.Last step, just drag and drop all of the F folders into Music Library of itunes.