Preserving for Posterity
The quest is unlocked after completing the Testing... Testing... One, Two... quest.
"There were many heroes in the battle against Calamity Ganon. To ensure their efforts are never forgotten, Terrako can stow an image from the battle in its memory, but it needs some materials."
"The heroes standing as one, facing destiny without fear... Terrako stored this image safely in its memory. As the others talked about that day, it made a sound as if to say, "Hey! I helped too!""
- Terrako: Bonus Combo