What is the limit of human memory? I am currently a high school student and have grown curious at what the limitation of memory storage in the brain might be in humans. 

Information is coded genetically and stored in the brain, but is there a limit to how much information a person can retain without forgetting?

In high school I have taken a broad courses in biology, chemistry, physics, calculus and more. I wonder if my desire to learn and keep moving forward will be hindered mentally by the intrinsic aspects of memory (if they do exist)?
http://www.scientificamerican.com/article/what-is-the-memory-capacity/

https://www.quora.com/Is-there-a-physical-limit-to-human-memory-If-yes-can-it-or-has-it-been-measured

It's said that you store everything or nearly everything you experience in your subconscious mind.