Booting and installing Kali from a USB stick is our favorite and fastest method of getting up and running. In order to do this, we first need to create the Kali ISO image on a USB drive. If you would like to add persistence to your Kali Linux USB stick.
Plug the USB installer into the computer you are installing Kali on. When booting the computer, repeatedly press the trigger key to enter the boot option menu (usually F12 or F11), and select the USB drive. You will then see the Unetbootin bootloader menu. Select the Live Boot option for Kali Linux.