The Walkman player is not recognized by the computer.

Follow the steps below if your computer of computer software doesn't recognize your Walkman player:

NOTE: If your model is NW-A100/NW-ZX500 series, refer to the following article: How to transfer content from a computer to the Walkman player.

1. Check operating environment
2. Check USB connection
3. Check USB Connection Mode settings　
4. Reset (reboot) the Walkman.       
5. Restart the Walkman and PC
6. Reinstall the device driver
7. Reinstall the computer software

1. Check operating environment
   Check that the Walkman is compatible with the OS.
   See Help Guide for compatible OSes by model.
    
2. Check USB connection
   Check that the USB cable is not dirty. Fine dust or dirt particles may prevent recognition. If the Walkman’s WM-PORT or USB cable terminal is dirty, clean it with a soft cloth.
   Check that the PC’s USB ports recognize the Walkman. Connect the Walkman to all of the PC’s USB ports and check that they recognize the Walkman.
   If you are using a USB hub, remove it and try connecting the Walkman to the PC’s USB ports directly to check that they recognize the Walkman.
    
3. Check USB Connection Mode settings
   IMPORTANT: This solution is for models that have USB Connection Mode Settings.
   The Walkman may not be automatically recognized depending on the PC connected. In this situation, by using the USB Connection Mode Settings to put the Walkman in connected standby mode before connection, your connection is more certainly ensured.
   
   USB Connection Mode setting method:
   1. Select Settings in the Home menu.
   2. Select Common Settings.
   3. Select USB Connection Mode
   4. Select Yes.
      
      NOTE: The USB connected standby screen will be displayed on the Walkman. Test recognition by connecting the Walkman to the PC.
       
4. Reset (reboot) the Walkman.
   Refer to the following for the resetting procedure.
   Reset (rebooting) the Walkman
    
5. Restart the Walkman and PC　
   Restart the Walkman and PC and check that the PC recognizes the Walkman.
    
6. Reinstall the device driver
   If the Walkman’s device driver is not properly installed to the PC, the Walkman will not be recognized.
   Check that the device driver is displayed on the PC.
   
   For Windows, check the following link：
   How to check the Device Manager for proper installation of the portable audio driver.
   
   For Mac, check the iOS device driver:
   1. Click About This Mac on the Apple menu.
   2. Open System Report. The Walkman’s drive will be displayed under USB.
   NOTE: If it is not recognized properly, reload the device driver.　
    
7. Reinstall the computer software
   1. Uninstall the software from the PC.
   2. Restart the PC.
   3. Reinstall the software.