Only SSD appearing on Computer - Can't save files on Hard Drive

[Solarten]

Hello! Recently a friend and I built a new PC running Windows 10. This build had 2 SSDs installed along with my 1TB Seagate harddrive. However, a friend who helped with the building process apparently only set it up so that only the SSD shows up under my computer. How can I make it so my computer will see the hard drive and other SSD?

[Allan]

Go to disk management and format the new hard drive.

[Solarten]

How do I format the new drive?

[Geek-9pm]

https://www.youtube.com/watch?v=f8WzSRQ2NtY
How to Create a Partition on Windows 10

[Allan]

Go to START - RUN - and type: diskmgmt.msc (then press ENTER)

Disk Management will open. Find the hard drive and it should show as unallocated space. Right-click on the drive and choose FORMAT (make certain you select the correct drive). Here's a more detailed explanation: http://www.disk-partition.com/windows-10/format-hard-drive-windows-10-0528.html