You might notice that you have repeating Memories as you open more and more Memory Packs. What happens to those Memories? Well, they are still getting collected in the same slots. Once you collect five copies of the same Memory, it will become a Treasured Memory and its frame will become golden.
You can also get multiple Treasured Memories! If you collect even more copies of the same card, and it becomes Treasured twice, the second Treasured Memory that you get can be turned into Memory Points which can be used to get you more Packs.