Seagate Technology today announced it is the first hard disk drive manufacturer to ship two billion hard disk drives (HDD).

It took Seagate 29 years to reach one billion units shipped and just four years to reach the second billion milestone.

"This is truly an impressive accomplishment and I am proud to lead this company as we celebrate this success," said Steve Luczo, president, CEO and chairman of Seagate. "This achievement is a testament to the commitment of our employees whose relentless dedication and personal pride continue to be the fabric of this company."

Digital content demand continues to stem from a wide range of sources, including social media and mobile devices, fueling the need for storage. Analysts estimate that over 4 billion hours of user-generated content is watched each month on YouTube alone. While user generated high-definition camcorder video, still pictures, and smartphone clip sharing storage needs are expected to quadruple from 2013 to 2015.