Eve T1 legacy boot

Hi!

I received files from Evetech. These needs to be copied in usb-stick and boot from it.
I have not been able to boot from this usb when it is attached to eve T1 tablet. I run some test with my desktop computer and secure boot must been turned off and legacy boot enabled to boot from this created usb. Is there option to enable legacy boot in Eve T1? I did not find this from bios or secure boot options.