To capture, deploy, and mount FFU images with DISM, you'll need to work in a Windows 10, version 1709 or later, or WinPE for Windows 10, version 1709 or later environment. To deploy portable FFUs, you'll need WinPE for Windows 10, version 1903 or later. To capture and deploy FFUs using the instructions below, you'll also need:
What are the system requirements to capture and deploy FFU images?
To capture, deploy, and mount FFU images with DISM, you'll need to work in a Windows 10, version 1709 or later, or WinPE for Windows 10, version 1709 or later environment. To capture and deploy FFUs using the instructions below, you'll also need: A Windows PC that has been generalized with Sysprep.
How to create a FFU image in Windows 10?
To create a FFU image, go to ‘Create Image’ tab and click on ‘DISM – FFU Create Image’ tab, as shown in the figure 1. Form the drop-down list, select the drive (in my example drive 0 is the computer’s hard drive and drive 1 is the external USB drive).
How to deploy FFU image to a larger hard drive?
Select the drive, type a name for FFU image and description; click ‘Create’ button. Now you have a FFU image file ready to be deployed to the computers that have larger hard drives. ⦁ On the destination PC, deploy the FFU image you capture in step # 3.
How much time does it take to apply an FFU image?
The time required to apply an FFU image is cut to less than half of what it takes to apply a WIM image, all else being equal. Starting with Windows 10 version 1709, you can use DISM to capture and deploy FFU images.

Below are two helpful articles on a similar topic 👇
What is Intel® performance maximizer?How to view Exif metadata from your photos?