Hi @carlos87,
I think Lizzie was just sharing the OS she was testing on (which was openSuse).
Are you running Windows on your laptop by chance? We had a few other users stating they couldn’t boot a Tails image after flashing with Etcher and they seem to have gotten it working with some configuration settings in Windows: https://forums.balena.io/t/ive-tried-flashing-tails-onto-4-usbs-and-i-am-getting-flash-failed/
Let us know if that works for you also or if you’re using a different OS.