Quote Originally Posted by MrBoot View Post
You'll be able to upgrade your PS3 account to a PS4 account, but it be a one way thing. Once you convert to PS4, you'd need to get a second PS3 key to continue playing with your PS3.

The upgrade is free, though. I would also assume digital download, but haven't looked into it.
Do I need to keep my FFXIV disc copy? How does the PS4 Store know that I am eligible for a free copy?