ISO Format - ISO to USB - ISO to USB bootable Converting ISO to USB bootable and converting ISO files to usb bootable is quick and easy! Before we completely convert from ISO to USB or from ISO files to USB bootable, we need to examine what ISO to USB bootable and ISO files are. An ISO file is an exact copy of an entire optical disk such as a CD, DVD, or Blu-ray archived into a single file. This file, which is also sometimes referred to as an ISO to USB bootable image, is a smaller sized dupl