If you are unable to see the drive to install Windows onto, and if you have a modern Intel processor on your PC, you need to go to the support page for your PC on the manufacturers website.
From the chipset section, download the installer for the Intel RST drivers.
Extract out the drivers from that installer and put them into a new folder on your USB.
When you reach the part of the installation where you cannot see the drive, click 'Load Driver, then select one of those Intel RST drivers.