Sony SACDs are heavily encrypted and can only be read by a Sony certified player. In order to play then from the sonicTrasnporter you need to convert the raw bitstream to DSF files. These are like FLAC files but for DSD and have the raw bitstream of the music and also metadata about the track.
You can do this yourself but it's very complex. A better way is to use a ripping service. This is a good one.
Once you have the DSF files you can copy them over like any other music files.
