- rewriting the partition table and formatting as FAT32
- copying Windows files on USB drive
- copying an extra file (bootx64.efi) if it doesn't exist
There is no bootloader installation procedure, like you would do with a BIOS bootable USB using the bootsect utility from Windows installation media in the boot folder:
bootsect.exe /nt60 F:
My question is, can a USB drive with no MBR boot in UEFI mode?