Hey, So I've had a SSD and HDD in my Macbook pro for a few years now, but recently I decided to go ahead and upgrade the HDD in the optical bay to 1TB. I bought a WD Blue drive, moved the old one into a USB enclosure and put the 1TB in the optibay. But for some reason I am having a LOT of problems with it :S. I am unable to format the HDD in the optibay, I had to format it by putting it in the enclosure. I am getting LOADS of permission issues, I can write anything to it. I have searched high and low and all the answers don't seem to work. I ordered another caddy to replace the cable and hoping its that, but will take a few days to get it. Any other ideas on what it could be? It is getting very frustrating.