1. Use iTunes to set the iPod to a hard disk mode and a manual management mode.

2. In the file manager menu, select "tools"->; Open the option to display hidden files in the option.

3. In the hard disk of iPod, you can see a folder of iPod_Control. Right-click-Attribute to unhide the attribute and apply it to all files and subdirectories.

4. Open iTunes, and in Advanced Options, set the file copy when importing iTunes. If you haven't changed this option before, you can ignore this step. Then select Add Folder to Database in the menu, select the iPod_Control directory on the iPod hard disk, and confirm with OK.