Why do you want to use Windows on a separate partition on the disk instead of installing in inside Qubes OS storage?
Maybe you can try to do it like this by attaching this partition to the qube and installing Windows on it but it’s untested:
Why do you want to use Windows on a separate partition on the disk instead of installing in inside Qubes OS storage?
Maybe you can try to do it like this by attaching this partition to the qube and installing Windows on it but it’s untested: