“True the Vote worked through a painstakingly massive data file (2 petabytes) of cell phone use to identify “ballot mules,” people who were paid by political activist groups to gather massive numbers of mail-in ballots, take them to a central facility, and then drop them off in various ballot collection boxes in specific states, specific counties and approximately 71 specific precincts.  The trackable cell phone data was then matched with CCTV records to identify and document the ballot harvesting activity that took place.”

https://theconservativetreehouse.com/blog/2022/04/11/true-the-vote-catherine-engelbrecht-and-gregg-phillips-outline-details-of-2020-ballot-harvesting-process/