"Memories... Do Not Open" is a 16-track album that features collaborations with various artists, including Daya, Kygo, and Anne-Marie. The album's title is a reference to the idea that memories are not meant to be opened or revisited, but rather left in the past.

As they continued to reminisce, they started to think about the memories that had led them to where they were today. They thought about their early days as a band, playing small gigs in New York City, and the struggles they'd faced along the way.