I have an Intel i5-4690, Gigabyte H97-Gaming 3 motherboard, 2x4 gb G.Skill Sniper ram, one 2.5 40GB HDD just for music and such, a WD Black 1TB HDD, a Samsung 840 EVO 120GB SSD, and MSI R9-280 with Windows 8. I want to use my SSD to download my OS on so wouldn't it be much easier to just plug my HDD's in after i am done with my PC build? Also i just want my OS to save to my SSD and Skyrim and everything else to save to my HDD, how do i set it to where only my OS and Skyrim game will be on my SSD and nothing else?