Souls?

[AFTT47]

The concept of souls came about before we understood digital storage of information.

So, would that mean that a soul is the sum of all the information stored in our brains, all our memories?

What else would it mean? It's just putting it in scientific terms.
I won't deny the possibility that we are more complex than that, that our mind is a product of something more fundamental that we haven't discovered yet. I don't see why we should assume that, though. I think the default assumption should be that our 'souls' is information.