The Wrong with Transferring head (Brains)

The concept of transferring one mental space to another or an empty vessel is complicated but not impossible or so I think. Once you get passed the initial obstacles such as medical and or physical compatibility you open a door problems of processing information. For example, if it was possible to transfer the brain of a bird to a fish you run into to imitate problems of basic survival. The bird brain inside the fishes body would struggle on the concept of breathing through gills, before the bird before tackling problems of swimming. To relate back the probability that the human mind would ever be able to transcend into a digital form is highly unlikely.  Clearly humans process differently than machines, but both are inspired by electical impulses so I believe it's far fetched but more than possible with time. Human digital brains are possible.