> For the complete documentation index, see [llms.txt](https://osd.osdeploy.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://osd.osdeploy.com/docs/trash/disk/backup-disktoffu.md).

# Backup-Disk.ffu

This function is intended to be run in WinPE and will capture an FFU Disk Image.

## Requirements

* One or more Local Disks
* DataStore to save the Local Disk FFU
  * Secondary Disk
  * Network Share
  * USB Disk
    * Make sure you have a fast one.  This is not recommended

## Usage

There are no parameters to this function

### Source Disk

You will be prompted to select a Local Disk to backup if you have more than one disk, otherwise there is no selection.

### DataStore

You will always be prompted to select a DataStore.  The path is generated automatically based on the Computer Manufacturer, Model, and Serial Number

### Execution

Just type in FFU to start the process.  This may take some time

![](/files/-MWSOixsr8uOKVEI8gJq)

{% embed url="<https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/deploy-windows-using-full-flash-update--ffu>" %}