This is my first time trying to install and use Ubuntu. I have a Dell computer that came preloaded with Windows with UEFI and Secure Boot. Windows is installed on the first drive (a 240GB Samsung SSD) and a second 2TB data drive is also installed.
I was able to successfully create a pendrive on a USB Flash drive to try Ubuntu with persistence. I can boot the USB Flash drive w/o problem by hitting F12 at startup to obtain a list of boot options. Windows boot manager is listed as well as the PENDRRIVE.
I have then used the install Ubuntu option on the PENDRIVE to try to install an actual version of Ubuntu on a second 32GB USB Flash Drive (SANDISK). My goal is to have Ubuntul installed on a flash drive that I can plug into the computer and use when I want by hitting F12 at startup to get the the computer's boot option menu. I've read the various posts and doc about how to install for a UEFI system (I created two partitions, one an efi boot partition and a second ext4 partition for the Ubuntu install).
The install completed successfully on the SANDISK, but when I start the computer, hit F12 to get a list of boot options, the SANDISK does not show up. The PENDRIVE does.
It seems obvious to me that it should be able to work as the PENDRIVE (live Ubuntu version) works on my system so I don't understand why the fully installed version does not work.
I have run Boot repair in info mode and here is the link for what it generated: