The link I was referring to was posted by the OP in post 6 and was what the OP used to attempt to create a bootable USB to boot UEFI and Legacy. Reviewing that link shows nothing about installing in Legacy mode but only UEFI. To boot also in Legacy mode, a bios_grub partition is also needed, both an EFI partition and an unformatted 1-2MB bios_grub partition, then installing Grub using the grub-install method described in post 5 modified to meet the OP's situation.Please specify which link and where we should expect details about the bios_grub partition.
Last edited by yancek; October 23rd, 2021 at 11:35 AM.
Thanks @yancek
No problem.
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