Question bootable usb not showing up in bios and boot menu

[LucasPerks]

i just bought a samsung ssd t5 portable, and i want to install windows on there. i have the complete working windows to go set up so windows will work on usb and then i went to boot into it and boom. its just gone, it wont show up at all, before you type anything i dont have legacy mode for some reason and apparently thats the solution to my problem but i cant do anything because i dont have legacy mode. help, what do i do.

 

[popatim]

Did you create a UEFI Win-to-go install?