Thread:DokkanGamer/@comment-29192161-20180623000822/@comment-34799065-20180623034202

"How long does the Facebook transfer last?"

-"It will also be more convenient to transfer your game account between devices if it is linked to your Facebook account." Meaning there's no time limit

"If I delete my game while linked will it delete my game?"

-"If the Facebook account to which the game data is linked is deleted, you will not be able to retrieve the backed up game data from the Facebook account." Your data will always be saved as long as your account is linked to Facebook. However, if the Facebook account is deleted, you will lose everything unless you get a transfer code before deleting you Facebook account.