Write ISO to USB - Win32 Disk Imager

How to easily write an ISO to USB, burn an IMG to USB, create backups, clone a flash drive and more. Win32 Disk Imager is a free disk imaging and cloning tool used to write raw disk images to a USB drive from Windows. As you might have guessed, this tool can also create a backup disk image of a flash drive. You can then use the backup image to clone a new USB drive or restore the original drive. Also included is a built in hash checker which helps to ensure your files aren't corrupted.

Much like Etcher, this tool works to direct copy data from .IMG or .ISO files to a removable device. Functioning like a dd raw write command by overwriting the entire disk with raw data from the source file. As a result, any existing content on the drive is overwritten. Some consider this method destructive because the entire disk, including the boot record and partition table data, becomes overwritten. In some cases the device might even appear unwritable. However, this is almost always only temporary.

If you need to, you can easily restore a USB flash drive to its original state after using this type of tool.
This tool works great for making clones of hard disk images, CD-ROM ISO files, or even exported virtual hard drives. When using this software, you should be aware that the new disk capacity is set to the source file filesystem size. However, in some cases this can be fixed by extending or growing the filesystem into the unallocated space.

How to Burn ISO to Bootable USB

You can use the Win32 Disk Imager to Burn ISO to Bootable USB. And if you use a bootable hybrid image, the resulting cloned drive will boot.

First, download install and start Win32 Disk Imager (Run as Administrator)

Write ISO to USB - Win32 Disk Imager
Writing an ISO to USB using Win32 Disk Imager
  1. Click the folder icon, then browse to and select your .img or .iso file.
    Note: From the file explorer browser window during step one, use the dropdown in the lower right hand corner and (choose *.* to show your ISO files).
    How to Show All Files
  2. Then, select your removable device from the device dropdown.
  3. Finally, click the Write button to write the Image to your USB.

That's all there is to creating bootable USB from ISO!

How to Backup USB Flash Drive - Clone USB

When you Backup USB flash drive, the resulting .img file of the device can later be used to restore the original contents on the device. Or you might wish to use the image to clone USB to another drive.

To begin, Start Win32 Disk Imager (Run as Administrator)

Clone USB - Backup USB Flash Drive to Image file

  1. Type a path as well as a filename to use for your backup image.
  2. Then select the drive you want to backup.
  3. Finally, click the Read button to backup your entire USB drive to the Image file.

That is really all there is to cloning a USB.

With the help of the Win32 disk imaging tool, you are able to burn or write ISO to USB, create backups of your data, and clone or restore a flash drive.