I can't really help you, But I'm sure that someone here can. For then to help you, they will need additional information though. So lets get that part out of the way. First, what do you have for a keyboard model? And second, Are you talking about recovering songs from your computer hard drive or you keyboard hard drive? Answer these questions and you will be that much further along. Then when someone reads your forum they will have the info they need and not have to ask you which will save time.
Sorry this was all I could do to help. I am a brand new owner of a kn6500 myself.
Tony