I am interested in using Trisquel 7 or 8, but my Korora Laptop is not able to boot my USB 2.0 Drive

So for now, I have ordered a CD with Trisquel 7 from OSDisc.

This is the Korora Laptop for more information (https://www.thinkpenguin.com/gnu-linux/korora-penguin-gnu-linux-notebook). I tried the solution offered in another thread, and it still didn't work (https://trisquel.info/en/forum/live-usb-made-dd-not-booting-korora-laptop#comment-80572).

Any suggestions?