Hard drive not showing up in My Computer

[The LOP]

Alright, so I just finished building my gaming rig. I have a 120 GB corsair SSD and a 500 GB Western Digital HDD. I unplugged my HDD in order to install my OS on my SSD in my bios. So now I plugged the HDD back in, and restarted the system and my HDD will not show up on My Computer. I went to the computer management screen and it says shows that my Hard drive is there, but all the space is unallocated. I went to my bios, and it does not show up there. Can anyone tell me how to fix this? Do I just need to allocate hard drive space? If so, how would I go about doing that. Any help will be greatly appreciated.

 

[rolli59]

Right click drive and give it a drive letter in disk management. http://www.tomshardware.com/forum/265764-32-guide-installed-disk-system

 

[The LOP]

Alright, I was able to partition space. But I cannot save anything to the drive. How do I put it to be my primary drive to save programs and such on?

 

[The LOP]

I was able to figure it out. I just needed to add a partition to my hard drive.