2. Incorrect Folder Structure: Ensure that you have placed your music files in the correct folder on the Walkman. The NW-E015F organizes files into specific folders, such as "Music" or "Audiobooks." Double-check that your music is in the appropriate folder so the device can recognize it.
3. USB Connection Issues: Verify that the USB connection between your Walkman and the computer is secure and properly established. Try disconnecting and reconnecting the device, or try using a different USB cable.
4. Full Storage Capacity: Check if the internal memory or microSD card (if inserted) of your Walkman is full. If the available storage space is insufficient, the device won't be able to store any new music files. Manage the existing files or consider expanding the storage capacity if necessary.
5. Software Updates: Ensure that your Walkman's firmware or software is up to date. Device manufacturers release updates to fix bugs and add new features. Check the Sony support website to see if there are any firmware updates available for your NW-E015F.
6. Device Malfunction: In rare cases, the Walkman itself might be experiencing hardware or software issues. Try resetting the device by holding down the power button for several seconds and then attempting to transfer the music files again. If the problem persists, consider contacting Sony support for assistance.