Creating a USB thumb drive loaded with Windows 10 installation media is very easy thanks to Microsoft’s Media Creation Tool. With a prepared USB drive you can install the latest version of Windows on a new PC or have an install drive at the ready should your current rig start to malfunction.
If you’ve never used the Media Creation Tool, however, even this simple process might be a little overwhelming. Here’s a step-by-step guide to creating a Windows 10 USB drive with the Media Creation Tool.
The first thing you need to do is go to Microsoft’s dedicated website for Windows 10 downloads, and click Download tool now to grab the Media Creation Tool. Now would also be a good time to insert the USB drive you want to use as your installation media. It needs to be at least 5GB in size (you'll see "4GB" in the tool, but Microsoft confirmed the larger number), and make sure you know which drive letter it’s been assigned (D, E, F, etc.) once you plug it in.