From the article: In all, lawyers connected to the case have estimated that approximately 1.7 billion pages of evidence was taken in the raid.
Think of the top-security Lds Granite Mountain Vault located in Little Cottonwood Canyon. In five of the six chambers, there's normal stuff you'd expect to be there: Mostly genealogical records and historical church records/items. But in that sixth most secretive chamber lies "evidence" of real historical Mormon crimes and limited cover-ups. Diaries. Journals. "Content" removed from wider circulation. Financial records. Post-death marital sealing records where Mormons have "married off" to each other people who are already dead! Quite a "who's who" list actually! Etc.
If authorities could nab 1.7 BILLION pages of fLDS evidence in a Texas raid, just think what a law enforcement raid on the Little Cottonwood Canyon vault would turn up.