Win32 Disk Imager is a disk imaging tool for Windows. This guide explains how to install and use Win32 Disk Imager. # What is Win32 Disk Imager? Win32 Disk Imager is a Windows tool for writing disk images to SD cards and USB drives. It supports disk images in IMG format. With this tool, you can write a disk image to a removable drive or save the contents of a removable drive as an image file.