Johnny Mnemonic (1995)
Based on the short story of the same name by William Gibson, Johnny Mnemonic is set in 2021, wherein half of the Earth’s population is suffering from Nerve Attenuation Syndrome (NAS), a disease caused by overexposure to electromagnetic radiation from omnipresent technological devices. In the film, sensitive data is no longer safe to send over the Internet, so there are so-called human couriers, like the titular character played by Keanu Reeves, who are literally carrying data packages inside their heads.
Luckily, at present, NAS remains a fictional disease. And while there are risks in transferring highly sensitive data over the Internet, there’s currently no need for human couriers like Johnny Mnemonic, as flash drives and external hard drives are way more practical to use.