500 gb SSDs that are under 100 bucks



RAM fits into the DIMM slots on the motherboard, a SATA 3 port connects your drives via cables. As previously said with the 1150 socket motherboards you would have 3 sata ports (at least, depending on the mortherboard)
So say you have one hard drive and one DVD drive already, that should leave you at least one space for an SSD