How to Add New Music to Your iPod via iTunes

1. Open your iPod playlist

2. Open the directory of your file
3. Left click on the file, hold then drag to the iTunes

4. Drop to your iPod playlist

5. Open your iPod tab

6. Click Sync and wait the iPod for syncing

7. Wait until it says "Syncing complete, OK to disconnect"

8. You've added new song to your iPod

How to Find Missing Audio File in iTunes

1. Open your iTunes
2. Double-click on the missing audio file (with "!" sign on the left side of the file)
3. Click Locate

4. Open the Directory where the file had been moved
5. Select the file and clik Open

6. Your file has linked back