Quote Originally Posted by SirGreenDay View Post
Do I need to keep my FFXIV disc copy? How does the PS4 Store know that I am eligible for a free copy?
Im fairly sure you simply log into your PS4 with the same PSN you logged into the PS3. Then it'd be just under your Account stuff in the Mogstation to migrate the license from PS3 to PS4.

All that is personal assumption though.