Chosen Solution

I installed (not live) a Linux O.S. onto the 2nd partition of this flashdrive. It won’t boot and there’s no “drive” letter designation.(in MSWin it should be F.G, etc in GParted it should be sdb2/sdc/2) When I go to either Win disk mgmt. or GParted, the area for changing/adding a drive letter is grayed out.. The second partition is active, primary and set to “boot”. First partition is active and primary. What I want to accomplish is assigning a drive letter so (I believe ??) the comp will recognize the second partition and then, boot up. [SanDisk Cruzer Glide 3.0/256Gb 1st partition; 200Gb (aprox 126Gb used) active, primary 2nd partition; 33.5 Gb (LM 19.1 uses 8Gb) primary, active w/ flag set to boot.]

You will likely need to format that 2nd partition with a linux compatible file system in all probability. All sandisk sticks I have used come with a single FAT32 filesystems on them. I don’t think you can create a bootable linux image on such a filesystem. What created the two partitions you have ? Also what type filesystems are currently on each of the two partitions you have?