Innovation is rarely quick and often only obvious in hindsight. Helium has been one of the greatest breakthroughs for high-capacity hard drives (HDDs). Being seven times lighter than air, helium creates less drag and turbulence when HDD platters spin. It runs at cooler temperatures, and when sealed, it keeps out humidity. All those benefits translate to dramatically increased data storage capacity, lower power draw, and better reliability. Yet helium-sealed hard drives almost didn’t exist. It to...