I think we operate like a network. I don't know where the cosmic hard drive is located, but we have a collective consciousness that we all share. Our brains are only a conduit, a bit of wet that receives and transmits data.

I think, when we die, our "minds" simply stop receiving data.

Now I'm a Deist and very pragmatic. I don't believe our cosmic creator would just waste us this way, so I postulate that we are reborn as someone else to continue the journey towards making the cosmic server all-knowing, feeding it all possible experiences in the human paradigm.