A device for reading waveform data of a musical tone from a primary storage device and transferring the read waveform data to a secondary storage device for tone reproduction includes a processor configured to perform: retrieving, for each waveform of a plurality of waveforms that represent a musical tone stored in the primary storage device, segment group information from the primary storage device; retrieving the plurality of waveforms that represent the musical tone from the primary storage device, the waveform group retrieval process retrieving a waveform or waveforms, among the plurality of waveforms, that have the same segment group information as a group; and writing, as a single group, the waveform or waveforms, among the plurality of waveforms, that have the same segment group information onto one of prescribed storage segments that are storage regions of prescribed sizes in the secondary storage device.