Just a report after finally installed fossa on a USB stick. It's tricky.
First, BalenaEtcher doesn't work. Grub says no kernel and it messed up partitions that Windows can't recognize nor format it. I even bought a new one still same. After many tries I gave up. By the way Windows diskpart, chkdsk, etc. don't work. A goo third party tool is mini tool partition wizard.
Second, UNetBootin doesn't work. It says succeeded but BIOS just skipped it.
Last, Rufus did it.
What about DD? Download link says offline.
The installation is a little hard but the puppy under the moon (or sun?) scene is very beautiful and calming though.