The only requirement is that it be FAT formatted, and it should have the boot and esp partition flags set (esp stands for EFI System Partition).

It seems difficult using the built-in system tools on either Windows 10 or Ubuntu to initialize a disk as GPT with an EFI system partition.

Tech Computing Can't install EFI Firmware Update? Check partition scheme; disconnect peripherals Some Intel Mac users are finding that their drive is partitioned using the wrong scheme.

The bootkit, dubbed ESPecter by ESET researchers who found it, achieves persistence on the EFI System Partition (ESP) of compromised devices by loading its own unsigned driver to bypass Windows ...

Fix Windows Backup failed to get an exclusive lock on the EFI system partition (ESP), Error code 0x8078011E on Windows 10.

Intel Security has released a tool that allows users to check if their computer's low-level system firmware has been modified and contains unauthorized code.