Select "Sync",and then open the local folder where your music files saved.
4). Select all music you want to sync to player, and drag them to the "Sync List" on the left side of WMP 10, click "Start Sync" to begin downloading:
5). When finish downloading, you can see the music files on the right side of WMP 10.
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Browser "My Computer", you can see the files already downloaded to player.
6). Disconnect the player, it will make ID3 Playlist automatic, this will cost about 8 seconds.
7). Then the player will process DRM licence, it will cost 5~10 seconds.