Hi folks

If you use boot from Virtual Hard drives method (VHDX) directly with no underlying OS apart from system UEFI partition (100Mb fat32), the MSR partition and an NTFS partition for your Windows systems on VHDX files then simply clone to external HDD / SSD and you've got a fully bootable Windows to go system with all your Windows OS's on the external device. All stay activated too as they are identical to existing system. No need for convoluted way to make wintoGo systems any more.

Also good to check on different hardware - just boot the USB on the new machine - Windows is excellent if new drivers need to be found.

I recommend using the VHDX method instead of the traditional way of installing Windows to the traditional "C" drive.
-- so much more flexible etc.

The only downside of course is that these can't be updated directly to a new major Windows build - although updates to existing builds work -- so you can't go from W11 -> W11 pre-release - however it can be done from within a VM and then convert back to physical.

Cheers
jimbo