Dism /Get-WimInfo /WimFile:D:\sources\install.wim
Dism /Get-WimInfo /WimFile:{ESD file path} or {WIM file path}

Then the edition number will come out, so make a note of it.

Dism /Export-Image /SourceImageFile:{ESD file path} /SourceIndex:{Index number} /DestinationImageFile:{WIM file path} /Compress:max /CheckIntegrity

Please change the extension to .wim or .esd as appropriate.

grub-install Create a fat32 partition of at least 100MB

mount /dev/100MB partition/mnt

mkdir /mnt/boot

grub-install --target=x86_64-efi --efi-directory=/mnt --boot-directory=/mnt/boot --removable --recheck

grub version 2.04 bug

grub version 2.04 cannot chainload iso Overwrite /efi/* with 2.02 .efi I extracted from lubuntu 18.04 iso

How to partition

The partition that stores the ISO must be fat32 /GRUB/boot/grub/grub.cfg

touch /USB_mountpoint/boot/grub/grub.cfg

grub.cfg

insmod all_video
insmod fat
insmod ntfs

if [ x$feature_platform_search_hint = xy ]; then
   	search --no-floppy --fs-uuid --set=root  XXXX-XXXX #ISO partition UUID
else
   	search --no-floppy --fs-uuid --set=root XXXX-XXXX #ISO partition UUID
fi

# System shutdown
menuentry "System shutdown" {
	echo "System shutting down..."
	halt
}

# System restart
menuentry "System restart" {
	echo "System rebooting..."
	reboot
}

# Firmware setup
menuentry "Firmware setup" {
	fwsetup
}

# Xubuntu
menuentry '[loopback]xubuntu-20.04-desktop-amd64' {
	set isofile='/iso/xubuntu-20.04-desktop-amd64.iso'
    loopback loop $isofile
    linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile
    initrd (loop)/casper/initrd
}

# Kail Linux
menuentry "[loopback]kali-linux-2019.4-lxde-amd64" {
	set isofile='/iso/kali-linux-2019.4-lxde-amd64.iso'
	loopback loop $isofile
	linux (loop)/live/vmlinuz boot=live findiso=$isofile noconfig=sudo username=root hostname=kali
	initrd (loop)/live/initrd.img
}

# Ubuntu Server
menuentry '[loopback]ubuntu-20.04-live-server-amd64' {
    set isofile='/iso/ubuntu-20.04-live-server-amd64.iso'
    loopback loop $isofile
    linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile
    initrd (loop)/casper/initrd
}

# WinPE
menuentry '[chain]Hiren’s BootCD PE' {
	insmod chain
    if [ x$feature_platform_search_hint = xy ]; then
   	    search --no-floppy --fs-uuid --set=root  XXXXXXXXXXXXXX #WinPE partition UUID
   	else
   	    search --no-floppy --fs-uuid --set=root XXXXXXXXXXXXXX #WinPE partition UUID
   	fi
        chainloader /EFI/Boot/bootx64.efi #bootx64.efi PATH
}

# Win10
menuentry '[chain]Win10_1909_Japanese_x64' {
	insmod chain
    if [ x$feature_platform_search_hint = xy ]; then
   	    search --no-floppy --fs-uuid --set=root  XXXXXXXXXXXXXX #Win Installer partition UUID
   	else
   	    search --no-floppy --fs-uuid --set=root XXXXXXXXXXXXXX #Win Installer partition UUID
   	fi
        chainloader /efi/boot/bootx64.efi #bootx64.efi PATH
}

Get partition UUID

lsblk -f /dev/sda

lsblk -f | grep MOUNT_POINT

Quote

https://qiita.com/SkyLaptor/items/7f2bf545e3d0a9170303 https://wiki.archlinux.jp/index.php/%E3%83%9E%E3%83%AB%E3%83%81%E3%83%96%E3%83%BC%E3%83%88_USB_%E3%83%89%E3%83%A9%E3%82%A4%E3%83%96 https://qiita.com/roamer7038/items/b61cc70404a4e5ab181b

At the end

Thank you for reading such a hard-to-read article