Canon EOS 80D Manual (en)

You can save the adjustment results for an image’s white balance to 
your computer as a white balance file (extension “.WBD”). White 
balance files saved to your computer can be registered in the camera as 
personal white balances 
Register the white balance adjusted in the [Remote Live View window] 
to the camera beforehand.
Click [Personal white balance settings].
The [Personal white balance settings] dialog box appears.
Saving White Balance to your Computer
1D X Mk II
1D X
1D C
Select the white balance to be saved to your 
computer and click the [Save] button.
In the window that appears, enter a filename, select a 
save destination, and then click the [Save] button.
The white balance file is saved to your computer.