I use a Kingston DataTraveler 100 G3 (32 GB) and have no problems. I have used if for installs & upgrades on both UCM modules and physical servers.
There are some USB drives that just don't work, you use the USB creator and all seems OK, but you can't boot from it!
“Some humans would do anything to see if it was possible to do it.
If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH'.
The paint wouldn't even have time to dry.”
Terry Pratchet