Scriptable Objects and Assetbundles

Hello, For context the player can select a story that he wants to see and then that story is loaded. Every Story contains a lot of pictures and is quite hard in terms of space (mobile game). I can get one story itself below 150mb but not more than one story.

The Problem lies in how the player selects the story. Currently I have a Buttonprefab that has a variable for the story the button is supposed to load. that variable is the scriptable object.

The problem is that as a result the story selection holds references to every single story which is basically the whole game

Im not sure how I am able to keep the stories apart from each other.

Thanks for any answers in advance