Does the chassis appear with the two 2TB disks in it?
You may have the wrong configator tool. There are a few different ones. Does the g-raid have thunderbolt? You can try here https://support-en.g-technology.com/app/answers/detail/a_id/768 or in the answer here https://community.wd.com/t/how-to-configurate-g-raid-removable-thunderbolt-3-using-usb-3-on-windows-10/234707.
I have has more success raiding on PC but that is just my experience. Best of luck.
