If you purchased an export key years ago, you generally still have the right to download those songs. On Xbox One , you can often find these in the "Ready to Install" section of Rock Band 4 's game management menu.
Exporting songs in involves moving tracks from older game discs into newer titles like Rock Band 3 or Rock Band 4 . However, due to licensing expirations, many of these "export keys" are no longer available for purchase for new users. Availability Rock Band 1 & 2 Expired New export keys can no longer be purchased. Lego Rock Band Expired No longer available for new export. Rock Band 3 Expired rock band song export key
⚠️ If you lost the key and the game is no longer sold new, you — Harmonix/EA support stopped issuing replacement keys around 2018. If you purchased an export key years ago,