backup/restore

Hi Guys,
Not sure if this is the right place as its sort of a support question but couldn’t find anywhere else to post it. I am running 17.3 on my pc and have a MXpro box that has android 4.4 on it and 16.1. I cannot upgrade to a later firmware as there is none. 17.3 will not load onto 4.4.
I have backed up my image several ways on my PC to try and restore it to the MX pro. This image I have tweaked so its my personal flavour so to speak. I cannot restore it onto the mx pro. I have tried backup and I have tried nan community portal and have tried backing up userdata but nothing works.

Is there a way I can get my image across off my PC to my MX pro box

Cheers guys