try a small ssd and just put ffxiv on it for starters. I'm saying this cause you can get one that's 60gb or less for well under 40 dollars US. Test it out. Then take the hard drive back. If it worked you found what will help you the most and your not out the money just yet. I did this with my wife's computer and found this to be true for her. Brand new 7200rpm drive and transfers were in the dumper. SSD even the cheapest one known to man and bam awesome teleporting now. She is windows 8.1 if that's any help. Hope this helps.