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USB Drive Directory Structure

The USB drive contains directories for backup images, configuration files, feature key, certificates and diagnostics information for your Firebox.

When you save a backup image to a USB drive, the file is saved in a directory on the USB drive with the same name as the serial number of your Firebox. This means that you can store backup images for more than one Firebox on the same USB drive. When you restore a backup image, the software automatically retrieves the list of backup images stored in the directory associated with that device.

For each device, the directory structure on the USB device is as follows, where sn is replaced by the serial number of the Firebox:


The backup images for a device is saved in the \sn\flash-images directory. The backup image file saved in the flash-images directory contains the Fireware OS, the device configuration, feature keys, and certificates. The \configs, \feature-keys and \certs subdirectories are not used for any USB drive backup and restore operations. You can use these to store additional feature keys, configuration files, and certificates for each device.

There is also one directory at the root level of the directory structure which is used to store the designated auto-restore backup image.


When you designate a backup image to use for automatic restore, a copy of the selected backup image file is encrypted and stored in the \auto-restore directory with the file name auto-restore.fxi. You can have only one auto-restore image saved on each USB drive.

To create a backup image for auto-restore, you must use one of these methods:

  • From Fireware Web UI, select System > USB Drive.
  • From Firebox System Manager, select Tools > USB Drive.

If you manually copy and rename a backup image and store it in the auto-restore directory, the automatic restore process does not operate correctly.

There is also another directory at the root level of the directory structure which is used to store the support snapshot that can be used by WatchGuard technical support to help diagnose issues with your Firebox.


For more information about the support snapshot, see Use a USB Drive to Save a Support Snapshot.

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