The search for a Chrome OS Flex ISO is a wild goose chase. Google does not distribute ISOs. They use the Chromebook Recovery Utility for a reason: it guarantees you are getting the correct, verified, virus-free build for your USB drive.
: Insert a USB drive (at least 8GB) to download and write the image. Manual Download : Advanced users looking for the raw image (a zipped file) can sometimes find the latest download links in the ChromeOS Flex Help community or developer-focused sites. 2. System Requirements chrome os flex iso
Instead of looking for an ISO, you need the official . Here is how to get it safely and correctly. Title: Install Chrome OS Flex: A Practical Guide
Prepare a USB drive: