Harmonix fulfills their promise to export legacy tracks for Rock Band 4, allowing players to download 47 songs from the first Rock Band. Currently, this is only available for PS4 players, but Harmonix has stated that it will eventually arrive on the Xbox One. In order to download the tracks, players need to use the same profile that completed the export offer. If you didn’t already complete export the tracks, unfortunately you are out of luck. The developer does not have plans to make the export offer available again at this time.