Plug in a USB flash drive (at least 8GB) to your computer.Make sure all your data on the USB is backed up since it requires formatting where all stored data on the USB flash drive will be lost.Download Rufus from its website and install it on your computer.Alternatively, you can also download the portable version, which does not need any installation.Download RufusOnce downloaded, run Rufus software.From Rufus, select the USB flash drive from the drop-down menu under Device.