Jun 07, 2015 · This last one boots in UEFI mode when possible, then in Legacy mode if no UEFI files are detected. Creating an EFI System Partition. If you are manually partitioning your disk in the Ubuntu installer, you need to make sure you have an EFI System Partition (ESP) set up. This partition holds EFI-mode boot loaders and related files.

Windows 10: How to "move" an EFI system partition Discus and support How to "move" an EFI system partition in Windows 10 Network and Sharing to solve the problem; I'd like to move a 200MiB EFI partition to the D-drive to join some unallocated space together.