UNetbootin has been broken for many, many years, but just today (a few years after the fact) I discovered that the previous GUI option to show all drives was readded as a command line option. So if the program doesn’t want to detect your drive, just use the
And voila, it’s working. I have no idea why it should have to be so difficult. The program categorically refuses to detect any of my USB flashdrives or harddrives, so since the removal of show all drives it’s been utterly useless.
PS This is basically only for Windows ISOs. For everything else you can just use, e.g.,
dd. Much easier.