Think about it.
A coppermind is a piece of copper that a Feruchemist can use to store their memories in, and extract at will. Once stored they kinda disappear from the users memory.
Our phones, or laptops, or any “storage devices”. Aren’t they also kinda like Copperminds?
Memories equivalent is the data we store on these devices. Photos, books, movies, notes, etc.
I find it quite cool to make this analogy. Might help theorising for the future of the Cosmere even easy.