I don’t believe Windows will transfer any single files over 4GB.
True, but the solution for removable drives is not NTFS, it’s exFAT. No journaling, less overhead, less heat. And the format the drive comes with. Did you try transferring your 5GB file before formating the drive?
As for booting a removable drive check out the Easy2Boot app. http://www.easy2boot.com/
