Hard drive is not visible

[Daniel Youssef]

So I have 2 hard drives and I just bought the 3rd, one of the 2 contained the OS and now when I was installing I had to delete the partition which contained the windows to install windows on the new hard drive, thing is the new hard drive I divided it into 3 partitions and only 1 is showing up (the OS) what should I do?

Disk management photo:

 

[Daniel Youssef]

uh I think I know the problem now, I didn't assign Letters to the Partitions which makes it visible now