Winclone 8 Standard to External USB-C Drive won't boot

Hi all! Just purchased this software tonight to create and move a brand new bootcamp partition from my internal drive to an external drive on Catalina. It’s a brand new MacBook 16" maxed out. Following the steps seems to give me everything I need but when I go to boot on the external drive it says Windows cannot boot and to insert the setup disk again. I know it booted on the internal drive as I checked before I migrated it.

Is there are step or three I’m missing? Really hope this works!


What kind of external drive is it? I have not been able to get a Thunderbolt 3 drive to work with my 16" MacBook Pro, but it works on other Macs.