That is correct.
- The “image” itself (of an experience) is not preserved; that would require energy. All necessary “mental factors associated with that past image” is maintained in vinnana dhatu.
- Even scientists are not aware of this concept. They believe all memories are in neural connections in the brain. But that cannot explain memories from past lives or out-of-body experiences like NDE (near-death experiences.) There is a vast amount of indirect evidence for both.