1) Can I install a third hard drive? This only has two slots... I have a free DVD slot... I'm assuming that's sata and I can have all 3
2) Is it hard to install a fresh OS on it? I have windows 10 on my hard drive now... I don't want to have to buy another copy of the OS
3) Which drive should I buy? My friend recommended at least 250 gb: http://www.amazon.com/Samsung-2-5...B00OAJ412U
I was thinking something less expensive like this...