You can just copy the files, there is no need for tools to prepare boot media. UEFI will look for efi/boot/bootx64.efi file (on x64 arch) on your removable drive and boot that. There are no magic boot sectors anymore.
The issue is with filesystems recognized by UEFI firmwares. The only mandatory filesystem is FAT32. Some implementations (e.g. Intel systems) can read NTFS, but unless you are targeting such a system specifically, you get to use FAT32, period.
And here comes the issue with the Microsoft's ISO files: the install.wim file is larger than 4 GB. It is possible to split it into multiple wim files, or recompress into esd archive (which is what the Microsoft's tool does), thus fitting into FAT32 limit.
The issue is with filesystems recognized by UEFI firmwares. The only mandatory filesystem is FAT32. Some implementations (e.g. Intel systems) can read NTFS, but unless you are targeting such a system specifically, you get to use FAT32, period.
And here comes the issue with the Microsoft's ISO files: the install.wim file is larger than 4 GB. It is possible to split it into multiple wim files, or recompress into esd archive (which is what the Microsoft's tool does), thus fitting into FAT32 limit.
reply