''The preconscious contains thoughts and feelings that a person is not currently aware of, but which can easily be brought to consciousness
I don't buy it. If it is below the level of consciousness it could just be activity without being actual thoughts. There does not need to be some other consciousness aware of this activity. Some precociousness.
There is activity that rises to the level of consciousness and activity that does not. There is no precociousness aware of thoughts before consciousness is aware of them.
The activity that is not a thought becomes a thought when something happens to it and it rises to the level of consciousness.
This is what we mean in our everyday usage of the word available memory. For example, you are presently not thinking about your mobile telephone number, but now it is mentioned you can recall it with ease.
The topic of memory is another quick dead end.
What is memory besides our experience of memories?
How does the brain store memories?
Memories are not experienced by some other consciousness either.
They either can be brought randomly or with the will to the level of consciousness or they can't.