Hi,
Thank you for posting your query on Microsoft Community.
Maybe it's unable to automatically sync CZ Mp3 player with Windows Media Player.
I would suggest you try the following steps and see if it helps. Kindly make sure your device is connected while performing these steps.
Method 1: Sync Media player with your device.
1. Press Windows key and type Windows Media Player. Click
Enter.
2. Click on the Sync tab on the upper-right corner of the Window.
3. Click on the Sync Options icon and then click on Set up sync.
4. In the device setup box, check the box for Sync this device automatically.
Method 2: Run Hardware and Devices Troubleshooter, also run Windows Media Player Settings troubleshooter
1. Press Windows key + X and click on Control Panel.
2. Change View by from Category to Large Icons/Small Icons.
3. Click on Troubleshooting and then select View all.
4. Select Hardware and Devices, and follow the on-screen instructions.
5. Once troubleshooting is complete, click on Windows Media Player Settings.
6. Follow the on-screen instructions.
Hope this helps. Please respond if you have further related queries.
Regards,
Jesinta Rozario