MAN! Where was this 10 hours ago??If it is not possible to connect that hard drive as a USB....via a USB cord to a USB port.....
Have a look at this
Unetbootin : https://unetbootin.github.io/
Be EXTRA careful where you download it to......to the desktop is good....or downloads is fine also
THEN......after you have elected which distribution to use...see screenshot below...
View attachment 8339
Linux Mint 20 is a good starting place.....
Then in the bottom of that screenshot you can see Hard Disk....and the space beside is blank ....click on that little arrow to open it and it will show a list of all hard drives/disks on the pc.....CHOOSE CAREFULLY....Make sure it is the SPARE hard drive....otherwise, you will wipe out the operating system on your PC (Windows)
I have NOT used this to install to a hard drive before....so proceed with caution.
(If the worst happened and you wiped windows, all would not be lost.....you would simply need to acquire a USB stick and 'burn' Linux Mint to that USB stick and then Install it. )
When I click hard drive and click the down arrow to select the drive the C drive is the only drive that shows up despite the fact that I have 4 others, 3 of which are blank.
I think this tool will download mint onto my current C drive, which isn't what I want. BUT, I think I can squeeze another download of win 10 out of my pen drive onto one of those other hard drives. THEN I can use the unetbootin to overwrite THAT hard drive. which is a completely ridiculous work around, but I suppose they all are.
While kinda dumb, I will give it a whirl, unless someone answers me by morning that I am only getting half the picture.