You have an ISO image and you want to use USB as an installation media, then for this you need to create a USB bootable.
We have a tool in the name of Rufus free available on net which create your ISO image to bootable one.
With the use of this software, we can also create Linux bootable USB from ISOs
Also, we can flash the BIOS and other low level utility on a system that doesn’t have any OS installed.
Rufus (Download Link)