How to boot from USB when eMMC is flashed with image

[Micky]

Hi numbqq,
From another ticket I mentioned in:

Failed to bring up with a verified image

Which Khadas SBC do you use? VIM3 Which system do you use? Android, Ubuntu, OOWOW or others? Andriod Which version of system do you use? Khadas official images, self built images, or others? self built images (this image is verified can bring up on couple of VIM3 boards) Please describe your issue below: I built an Android image, it’s verified on couple of VIM3 boards. My VIM3 device can bring up with this image before as well. But recently, it’s failed to bring up with this identical i…

From Xiong.Zhang’s analysis, it has high probability the eMMC was broken, so I need a way to flash the ubuntu/android into the usb disk and boot system from the usb stick, then I could use my VIM3 to do something even if the eMMC was broken.
Could you help guide me how to reach this goal? Thanks in advance:)