You can often format as NTFS and have it work anyway, but it depends on whether or not the system UEFI firmware includes an NTFS driver. Rufus puts such a driv

You can often format as NTFS and have it work anyway, but it depends on whether or not the system UEFI firmware includes an NTFS driver. Rufus puts such a driver in its FAT32 boot partition and loads it before starting the winpe. It drives me nuts that the UEFI sites never included ExFAT.