Please note: this product comes on a portable hard drive * "Waveless" and Much smaller size, only uses 1/8 of the hard drive space compared to previous! RealTracks and RealDrums no longer need WAV files – they can use WMA natively. * Tempo stretching quality enhancements. Now the RealTracks sound great over a much wider tempo range, typically -15 and +40 beats per minute. * And many more... * For added convenience, get the UltraPAK Hard Drive "Audiophile" Edition on a 160GB portable USB Hard Drive. This includes all the content of the disc version, plus the WAV files for the RealDrums and RealTracks.