How else are you going to rice your Debian install?

Well, my laptop only has one spot for a drive. I guess if you have more than one, it should work. The main point is never share a drive with Windows. Windows will mess it up.

Personally, I dual boot with an external NVMe drive. It works great! I have Linux and only Linux on the internal drive and Windows gets relegated to an external one.

The trick to getting it to work is: you have to temporarily install the NVMe drive internally in order to install Windows onto it. Then you pop it into an external enclosure and it just works. Just make sure your BIOS is set up to boot USB devices before internal drives.