i am almost to that point where i am able to build my pc and i need to know... can i store my ISO and my backups on the same usb and when i go to put it on my new computer will the files interfere or not? (win 8.1) also my laptop came pre built with windows and i found my windows key so can i take that one and use it on my new build?(i hear my laptop loses it then or it doesnt work but idk please elaborate)