Hi Lazar
Thank you so much for your help, I reinstalled the firmware using a USB storage and I think my Omega2 is alive again, now my terminal and the df command looks like this.

Before making a mess again, I would like to know if the steps to Booting from External Storage (micro SD card) are the same as shown at
https://docs.onion.io/omega2-docs/boot-from-external-storage.html
Or are different for the new firmware?

Thanks for your time.