If you’ve just downloaded a large file ending in .iso and double-clicked it only to see a folder pop open, you might be scratching your head. How do you actually install it?
Let’s clear up the confusion and get your ISO working. Think of an ISO file as a virtual copy of a physical CD, DVD, or Blu-ray disc. It is a single file that contains an entire file system (folders, data, setup files) inside it.
Here is the truth that often confuses new users: Instead, you either mount it (to run software) or write it to a USB (to install an operating system).