Does the Fourth Amendment require a warrant to open a digital file flagged by a private company's algorithm as potentially illegal?

QUESTION PRESENTED Technology companies automatically scan trillions of digital files that are uploaded onto their servers, including emails and photographs. Their algorithms can scan for anything, from faces in photographs to the content of digital files stored in online file storage systems. The question presented is: Does the Fourth Amendment require police to get a warrant before they open a digital file that was flagged by a private technology company’s computer program as potentially containing illegal content but that no human being has previously opened?