How to create a multiboot flash drive (BIOS + UEFI) with the ability to install Windows and Linux?

Question

linux

Hello!
I just can’t find a suitable article on creating a multiboot flash drive (BIOS + UEFI) with the ability to install Windows and Linux.
There is grub4dos, a wonderful utility that gives everything you need, except for UEFI.
And in connection with the current mass distribution of UEFI, this is a big minus = (How to solve the problem?

Answer 1

The first thing that came to my mind was to use a full-fledged grub-efi + grub4dos, but UEFI can only load from FAT partitions, and I need to store more than 4GB images on the partition. I tried to somehow make a FAT partition for the UEFI bootloader on a USB-HDD, and store the data on an NTFS partition. But there is no time to bring everything to mind.

Answer 2

Here you will need grub-efi / grub2-efi, the NTFS.efi driver (if you need files larger than 4 GB, the driver itself can be obtained from the BIOS of some modern boards) and a correctly written grub.cfg.
I must say right away that you can boot a Legacy OS from a UEFI bootloader only if the BIOS has and has the Compatibility Support Module enabled, so it's best to keep two independent bootloaders on such a flash drive.
I also tried to get confused by this, but instead I bought just such an emulator and scored.