UEFI without FAT32 partition

[x09]

Hi, If i use ext2/3/4 partition, EFI load not worked. If i use FAT32 partition , EFI is fork fine, but i can not copy big size ISO. In addition, the format FAT32 is very old and not reliable.

I suggest use FAT32 partition for grub/efi, but all iso files store on ext2/3/4 partition. It's possible ?

as example: /dev/sda /dev/sda1 - fat32 - (200-500mb) /dev/sda2 - ext2/3/4 - for all files

OR Make it possible to point multibootusb/iso to another partition