1. Two ways to add, the first is to directly select the music you want to synchronize and drag it into iTunes.
2. The second method: Click "File" in the upper right corner, and select "Add file to database" or "Add folder" according to your needs Add to database."
3. After the dialog box pops up, please select the folder you want to add.
4. Adding music to iTunes is completed.
5. After connecting the iPad 3, set it in numerical order in iTunes and click Apply.