At first, you need to make booting disk in your USB.
You can download the Ubuntu OS for desktop in this link below https://www.ubuntu.com/download/desktop
And, you can also download the Universal USB Installer
MAKER
At first, you need to make booting disk in your USB.
You can download the Ubuntu OS for desktop in this link below https://www.ubuntu.com/download/desktop
And, you can also download the Universal USB Installer