Move armbian os from tfcard to emmc vim2

Which system do you use? Android, Ubuntu, OOWOW or others?

Ubuntu on the eMMC and Armbian on an additional tfcard

Which version of system do you use? Khadas official images, self built images, or others?

Khadas Ubuntu image and Armbian official VIM2 image

Please describe your issue below:

I installed Ubuntu to the eMMC when I received the VIM2, I prefer Armbian which I use in OrangePI SBC but I could not find an Armbian distro which the Burning tool will commit to eMMC. I have produced an Armbian image on a tfCard which works great, however I wish to transfer that image to take advantog of the 64 Gb eMMC card on my VIM2. I can find nothing on the web to assist in carrying out this transfer. How can this be achieved?
Conversely, how can I format the eMMC and use that for additional storage for the Armbian installation. For information, I do not need or want a dual boot installation.
Many thanks,

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