The tool will show a list of your connected drives. Triple-check you have the correct drive letter (E:, F:, G:).
Need to install or repair Windows 10? Don't pay for a disc. Here is your step-by-step guide to downloading the official tool and creating a bootable USB drive in under 15 minutes. You just bought a new SSD, your PC is crashing, or you’re building a new computer. There is one tool you cannot live without: A Windows 10 Bootable USB.
Why? If you select "Upgrade this PC now," it won't make a bootable USB. We want the portable tool.
How to Create a Windows 10 Bootable USB Drive (The Easy Way)