PC Building Beginner: Needs Suggestions

ssd (solid state drive)would probably be best but most expensive dvds would be ok that is want i'm using right now but take some time to burn it on to dvd's and still can be damage over time but you can get a spindle of 100 dvd for 20 bucks so that's 430 gb of course a back hard drive is my best bet since it's right in the middle and still easy to do regaler back ups