A single memory is stored across many connected brain regions
There is also another model about memory which I totally love. In that memory is not stored but brain is more like an antenna which can retrieve information from the space time coordinates where events actually took place.Because everything is constantly moving around something each event in the universe probably has unique location, a real physical place where it happened.So, the idea is that as we’re moving through space we’re  leaving a trail as the events are (lack of better word) “printed” in the fabric of space. Then as apparently Space is not empty at all but filled with Planck scale micro wormholes entangling all things into this one universal neural network, then our brains should be very well capable of tracing back our unique trails through space and retrieve information through those micro wormholes.As developer I think it would make most sense to only save references rather than trying store all events inside everyones brains. That would be huge waste of resources and just damn stupid.And probably the way we humans have built our computers also reflects how the universe really works, because after all we are bits of the universe doing whatever the universe is doing.Peace