flash yocto image to emmc

I made an image with yocto. I copied to the archive content to the SD Card with the tool Balena Etcher.io
What are the files is required, to copy the content of my microSD card to the eMMC?
I used the beagle-flasher but it propose only copy emmc to microsd. What is the procedure to copy from the microSD card to eMMC storage?