The long term storage unit of one’s personal knowledge. The key benefits of storing knowledge in long term memory are that it has much higher capacity and is stable meaning that it is harder to forget things when they are shifted from working memory to long term memory (although it isn’t always easy to do so).
The long term memory is analogous to the hard drive of your brain.
It can be further subdivided into two components: declarative memory and nondeclarative memory.