I think you are drowned in the science fiction movies. A consciousness is a spirit. A human being during his/her lifetime is living with many consciousnesses. For example, when you discuss about history, a spirit related to that subject (history) possess you and make you to point out the errors from what others said. When you discuss about cooking, a spirit related to that subject (not the spirit of history) possess you. These things are common in all human beings. A spirit cannot be uploaded. You cannot record the voices of the spirits. First of all the science must understand that there are spirits and find the ways to record their voices. Even if they are able to record their voices they cannot talk or contact with the specific person because no one lives in any form after death.
This is a short form of my research based on my personal experience. A human being is always living with a group of spirits which have joined one by one since birth. Between creatures (including human beings) and God there are millions of invisible elements. There are divisions too. We are just robots made of different materials (flesh, bones, nerves etc.,) created by scientist God or eternal beings to entertain God. Each of us have memories like computers have RAM. RAM chip may be considered as a mind of a human being, The fed things (data= knowledge=several spirits or invisible elements) are in contact with the mind since childhood. A brain is a media to connect spirits to a human mind. A mind is nothing but a computer's mind. After the destruction of a computer completely you can't get it anywhere. The same is the case with human beings. In fact, all stuff related to a human being lives with a human being in the form of spirits. Even thoughts are not our own. One after another the spirits think and we choose (accept) or reject the ideas (based on the knowledge we have possessed) which they transmit to our mind through our brain in the form of thoughts. If current (electricity) stopped the memory chip loses all data. This is with a computer. The same thing occurs to all of us. Computers are functioning by electric power but human bodies are functioning by natural power. We call this as soul. This soul is nothing but just an energy which is needed for the functionality of a body. If this is consumed the functionality ends. The spirits leave the body and go to different places. No one lives in the form of spirit or anything else after death. We are simply our bodies, the toys made for spirits for their games.
After death no one is going to be anything. Can you remember all that happened to you when you were a baby? You forget everything very soon. Even at the age of six, you don't know what happened to you when you were a baby. We are still new born babies. What you see in you, may be changes of intelligence or changes of behavior, manners etc., whatever may be, are spirits - real spirits. That's why certain people during their deadly accidents lose everything and remains like a baby. During these accidents, the extremity of shock drives the spirits away from the body or contact. Their behavior changes or go back to a level according to the number of spirits they have lost. After death all becomes nothing.
If you know the truth you will understand yourself that reincarnation is not at all possible. To form a reincarnation all spirits which lived with a body must possess another person together. Then only he/she can feel same thing of the demised person. But this is not happening because the spirits never stay together to haunt or possess another. They go to different bodies. Rarely there might have been certain cases but I think it had changed after some time. Spirits during their life time live with many bodies (one after another). Their memories sometimes affects the person. This is natural. This is not enough to believe that there is rebirth. No one returns after death. A human's life ends with a single body.
There is no hell or heaven for human beings. They are only for spirits. I guess that the heaven is just the sky and hell is the prison for spirits. Good spirits are free to go anywhere in the sky but bad spirits are put in prison for certain years. Their lifetime is limited. If what they (spirits) have said is true then they live approximately for 500 years. Spirits are separate elements. There is always a common fate which is always applicable to all creatures including human beings. That is, we are like other creatures except that we have an additional sense (sixth sense). This sense had changed only the living conditions of the human beings but not the fate. The fate is almost same to all creatures including human beings.