Check that the USB cable is properly connected to the computer.

Use the supplied USB cable.

You may not be able to transfer data when using a USB hub. Connect directly to the USB connector on your computer.

The version of the installed software may be earlier than that of the Media Go version 2.4. Install version 2.4 or later of Media Go.

There is not enough free space in your Walkman, or the number of files has exceeded the maximum number of transferable files. Delete any unnecessary data to increase free space. See “Maximum recordable number of songs and time (Approx.).”

Songs with a limited playing period or playing count may not be transferred due to restrictions set by copyright holders. For details on the settings of each audio file, contact the distributor.

Some of the data on your Walkman may be damaged. Return required data to the computer and initialize (format) the Walkman.

If the software is not compatible with your Walkman, install compatible software and use the compatible software to transfer data.

You may be attempting to transfer corrupted data. Delete the data that cannot be transferred from the computer, and import this data into the computer again. Do not perform any other tasks on the computer when transferring data to your computer. Doing so may cause the data to corrupt.

You may be attempting to transfer a file that is not in playable format. Check the “Supported formats.”