OK first of all do a back up of you SSD to your 4TB drive so you don't lost
your important data like your pictures and couments.
2.- In the UEFI go again to Boot and make sure to disable Fast Boot. This is
because the fast boot usually prevents to boot USB pen drives.
3.- Did you create the Trisquel Live USB already? Please create it.
4. in UEFI in boot below Fast boot there is a USB support option that says
partial, could you click it and show me what options you have there?
OK for now I think that is enough. Hopefully the next step will be to install
trisquel now :)
