N.B. These firmware updates are for the XDH Pro (H.264) and not the XDH (H.264) or XD (MPeg 4)
For the XDH or XD Please go to XDH Firmware Updates or  XD Firmware Updates

Then Download and install the appropriate Firmware below

Firmware version 1.13 Released: 20/11/2012
Kernel
    Version 4: Download
Ramdisk
    Version 1.13.3 for XDH Pro 8 Channel: Download
    Version 1.13.3 for XDH Pro 16 Channel: Download

Relaese Notes:
- Adjusts time calculation to reduce time loss
- Correct an issue with the Ramdisk Update process
- Improve hard disk compatability

Installation Instructions Format a USB stick with FAT32
Copy the downloaded files so that the files on the USB stick are listed as ‘udr7xxSBrd_x.x.x.bin‘, 'udr7xxkernel_4.bin'
Once confirmed, plug the USB stick into the XDH DVR (Either the USB above the DVD drive or in the back of the DVR)

From the DVR:
- Press ‘MENU’
- Go down to ‘System Setup’ Press ‘OK’
- Go Down to ‘S/W Upgrade & etc’ Press ‘OK’
- Update the Ramdisk first, Press ‘OK’ on ‘RAMDISK’
It will search the USB stick for the appropriate file and then begin the update. The DVR will restart.
- After Ramdisk updated, Update the Kernel, Go to the same menu as lsited above, then press 'OK' on 'KERNEL'

Previous releases:

1.12: 20/11/2012 - Download: 8;16
1.11: 07/09/2012 - Downlaod: 8;16
1.10.3: 16/03/2012 - Download: 8;16
1.10.2: 13/01/2012 - Download: 8;16
1.10.1: 28/06/2011 - Download: 8;16
1.9.0: 28/06/2011 - Download: 8;16
1.8.1: 22/03/2011 - Download: 8;16
Kernel V2: - Download
Kernel V3: - Download
Please note that after applying this update, you may require the latest Network applications.
Please follow the XDH Software link below and download and install the latest version.