For full details, see 'Windows 10 tip: Create a recovery drive.') (The easiest way to find this tool is to type Create a recovery drive in the search box on the taskbar, then click the shortcut from the search results. Plug the USB flash drive into your PC and use the Recovery Media Creator tool create Windows 10 recovery drive.This process will delete all data on the USB drive, so back up any important files before proceeding.
In addition to the ISO file, you also need a USB flash drive at least 8 GB in size. From that same File Explorer window, you can also create bootable Windows 10 installation media on a USB flash drive.