Making an ISO image of a hard drive means creating a 1-to-1 backup copy that consists of a .iso file. Here are two ways to do just that.

Use Microsoft's media creation tool Microsoft has a dedicated tool that you can use to download the Windows 10 system image (also referred to as ISO) and create your bootable USB drive. 1.

You can create an ISO file from a CD, DVD, or BluRay disc using Windows but you’ll need to use a third-party app as this functionality isn’t built into the operating system.