How to make a mirror image?

I want to make a mirror image what is similar to
So I can build a development environment only once.
It’s better to finish it under the windows system.

hello tianhuxiaozi,

just for confirmation, were you working with Nano-SD or Nano-emmc?

SD card.

hello tianhuxiaozi,

you may found the script file to generate the SD card flashable image for jetson-nano and also jetson-xavier-nx-devkit platforms.
for example,

please also check Write Image to the microSD Card for detail steps to prepare your microSD card with Etcher;
you may also check similar discussion thread, such as Topic 80283, and Topic 109010 for reference,