Our memory has it only once
In a computer or a phone or any other device you can store a photo or a video or a file as many times as the storage capacity permits. You can either store it with different names or store with the same filename in different folders. Have you realized that this is not the case with our memory? We can store it only once. I haven't found a way where we can store it more than once. Imagine a vacation photo, can you have multiple copies of that in your mind?
Another interesting part of human mind is that the storage is limitless, we can store as much as we want.