Update your software
Consolidate the media files in your music library
The media files in your music library might be stored in several locations. Consolidate your files to make sure that the content is stored in one location, then try to sync again.
Consolidating your files can correct permissions and simplify the syncing process.
Check for issues with third-party security software
Some third-party software, including security software, can interfere with the sync process between your computer and your device. Change your security software's setup and then try to sync again.
If you still see the error
In some cases, there might be an issue with specific songs that you're trying to sync. To identify the songs:
- See if the error message includes which songs are causing the issue.
- Sync only a few songs at a time, adding more until the issue occurs again.
For issues with songs that you bought from the iTunes Store, you can delete and then redownload apps and redownload music. You can also download apps and download music directly to your iPhone, iPad, or iPod touch.
You might have an issue with songs you copied from a CD or didn't buy from the iTunes Store. In this case, delete the songs and then import them again from the original source.