Okay so I've built a custom computer and for months I've had these 4 hard drives in it. I want to use them all but when I open the computer window it only shows 1 of my 4 drives. I know it's only one because it shows only a terabyte of space and not the 4 that should be. If I open device manager I can see the drives and I can see the drives in my bios. I'm starting to think I need to partition them in order for them to show up and use them. What are your ideas and if you've had this problem before, how did you fix it?