Just wanted to update this post after setup. I never had to put the HW disc into my PS4 console. All I had to do was redeem my code through PSN and then log into FFXIV and it automatically downloaded and installed the expansion. So far I've been able to play disc free, but I haven't actually made it into Ishgard yet. I also feel it's important to note that all my previous purchases were digital versions and I also played beta and had early access to HW on PS3.