I have a 1TB HDD installed. I'm getting a 2TB external hard disk this week. I'll have to take back-up and master format the HDD. The games I'll be installing are GTA V, Witcher 3, Arkham Knight, MK X, AC:Rogue, AC:Unity and some older titles. Is it advisable to install on the OS's primary partition by having more than 300GB or to install those on D: Partition?