I have a 1TB i have been sitting on waiting ti install. Its a easy setup. Just make sure Before you unplug your drive you have all your saves backup. As for Install data your shafted you have to reinstall all your game there no way around it. I would look online to see if there still an issue with drives over 2 tb that dont go to rest mode. but im sure its been patched already. As for loading times the stock HDD is 5200 RPM but putting a 7400 RPM drive you will not really gain anything. you would have to get a Hybrid HDD/SSD for a small boost or a full SSD for a super fast boost. But most ppl go Hybrid cost of the high cost of a full SSD drive.