Considering "
You would never believe the files kept on everyone of you, for that matter, you'd never believe WHERE they are kept."
DNA makes perfect sense.
Our life story files are inside our DNA aka "Genetic Memory" aka "Book of Life"
https://www.sciencealert.com/memories-can-be-inherited-and-scientists-might-have-just-figured-out-how
https://www.iflscience.com/health-and-medicine/ancestors-genetic-memories-passed-on-14-generations/