Under some situations, need to modify the binary image.
Under some situations, no development environment.
Under some situations, even no Linux. Only have windows.
Board bring up need simple settings, such as simple/tiny rootfs.
Create small sdcard mirror image
All operations are on binary files no need development environment(offline)
Set the u-boot environment on binary image
Windows OS support
extract each one to have below files
Put together and extract them.