Dear Stanton,
I'm Dyari. Thanks for reaching out. I will be happy to assist you in this regard.
As far as I understood your question, you want to perform a clean install on SSD 1 but it does not let you to do that? is that correct?
To fix this issue, kindly try the following steps:
1-If your SSD 1 still has windows 10 installed on it and you can go into windows, download the latest update of firmware and BIOS from the manufacturer's website, then try to update the windows update.
2-Access this link then click on Update Now:
https://www.microsoft.com/en-us/software-downlo...
3-Access this link then click on Download tool now:
https://www.microsoft.com/en-us/software-downlo...
After that Upgrade the system.
4-If your SSD 1 has no windows 10 installed on it, Connect the Bootable USB Stick that you have prepared for performing clean install. Once you get the adding partition window as you mentioned that the format option is greyed out, press F10. The CMD screen will be appeared and then type these commands and hit enter after each command:
diskpart
list disk
select disk X (Replace X with the SSD 1 number)
clean
Close CMD, restart the computer then try to perform a clean install again:
https://answers.microsoft.com/en-us/windows/for...
https://answers.microsoft.com/en-us/insider/for...
Please let me know if you need further assistance and keep me updated.