Put the Sony ws414 on the supplied charging/downloading base and connect the data cable.

Connect the data cable to the USB port of the computer.

Copy music in mp3/wma/wav format on your computer to my computer.

Disconnect the USB connection from the computer and remove the Sony ws414 from the charging/downloading base.

The specific thing is that you must transfer songs through SonicStage. First download the songs from the Internet, then open SonicStage and pour the songs you downloaded (press Ctrl+O). After that, connect your MP3 to the computer. After a while, click Transfer in the upper right corner of SonicStage and your MP3 will be displayed.