The human brain contains roughly one hundred billion neurons. 

Alone, these neurons would only allow us to retain about as much information as a flash drive.

 Fortunately for us, our neurons connect and combine, creating a web that exponentially increases the brain storage capacity. In fact, this process creates so much space that we can store the equivalent of three million hours of video content. 

So why can't we remember everything we try to commit to memory? 

Our brains are constantly adapting to the present moment. Our brains can override information we no longer use with newer, more relevant ideas. Our brains make these decisions for us, whether we like it or not. 

They help us hold on to the things that matter and make space for whatever the future may hold.