I have an empty external 250GB 5400RPM HDD and a 7200RPM HDD in my computer. The thing is that my computer's HDD is running low on space. I don't want to move things over. The problem is that I want to download more games but not sure which one I should put them on. Should I put them on the external but slower RPM one or the internal HDD? Will putting my games on the external HDD cause them to run slower compared to the internal 7200 HDD?