U will need the SonicStage software to be able to play your audio files on your HD5. You will notice the audio files be converted to .oma type. Still you can treat the drive as any portable drive and drag and drop the files into it be it MP3 or anything else but you can't play the audio files by doing so.
Hope the reply helps!
There are some problems reported regarding sony's software(NW HD5).Is the software reqd to transfer data? or Can i just drag and drop

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