If you don't need to save anything just format and install the SSD with a new install of Windows. Once you're into Windows just format the HDD and use it as needed.
It is perfectly possible to have two full installations of Windows on 2 different drives and just pick which one to boot from. Meaning you can just leave your 2TB as is even and just install Windows onto the SSD and pull stuff off the 2TB as needed. Could even split it in half partition wise, move stuff over you need to that partition, nuke the original one, and extend the second to fill the drive. Effectively wipes the whole thing but keep what you need.
It is perfectly possible to have two full installations of Windows on 2 different drives and just pick which one to boot from. Meaning you can just leave your 2TB as is even and just install Windows onto the SSD and pull stuff off the 2TB as needed. Could even split it in half partition wise, move stuff over you need to that partition, nuke the original one, and extend the second to fill the drive. Effectively wipes the whole thing but keep what you need.