I built my computer with a 500gb hard drive and now it is starting to run low, I want to get another 500gb hard drive to add more storage to it, but is it as easy as just buying one and putting it in? Or do I have to go through formatting it, transferring data, and putting the OS on that drive too? I am not too great with partitions and formatting things like that, so I need to know what I will be up against if I decide to buy a new hardrive.