It's not exactly FAT32, but close enough. I don't know if they provide any way to bypass the 4GB limit, but I doubt it. Still, that would be 4GB per file, and

It's not exactly FAT32, but close enough. I don't know if they provide any way to bypass the 4GB limit, but I doubt it. Still, that would be 4GB per file, and UEFI provides a file system access interface, so you could easily load in more.