8TB capacity and 23% lower energy consumption. That's the power of helium. Meet Ultrastar He8, HGST's second-generation hard drive based on the widely accepted and proven HelioSealâ„¢ platform. With 8TB and 6TB capacity points, Ultrastar He8 goes beyond what any other HDD can do using air and raises the standard for capacity and power efficiency in cloud and hyperscale data center environments.