You are not being very clear here, are you trying to install (with calamares ?) to the same usb drive that you use to boot the live ISO from (that will not work) or to a second USB drive ? Or do you use something else ?
same usb. The installer seems to block selecting the first partition, and offers selection of the second partition that was made as a persistence when placing the iso on the thumb drive with rufus earlier.
reading about it seemed to suggest that it wouldn’t install on the first partition because it is averse to fat32, but prefers fat for the efi which does get placed there.
I was using the one, and trying to install to write on the same usb. Technically the installer gives the option to write to the 2nd partition. I had created the 2nd partition for persistence.
There seems to be conflicting information/opinions online about what you can or can’t do.
I’ve gone ahead and rewritten my other usb with the fresher iso download. I’ll go ahead and install on the usb I was trying to use with the iso on that.
Sometimes it’s said that that won’t work. I want the os to be portable, and not depend on any individual computer apart from the usb.
The USB stick used for booting the live session can not be used. It is blocked. And yes as of the installer is kept very open for changing things it is the same also open to do things that will not work in cases.
Using the same USB is simply not working as of the way it is loading from that and other things.
And in general there is no USB persistence installer option. You can do but it do not prevent you from doing it wrong.
I wouldn’t be doing it in the first place. USB with persistence is not something i would ever want to use. Installed on hardware is the only way to go.