From Press Release:

Seagate (NASDAQ: STX), the leader in hard drives and storage solutions, today unveiled the world’s first 3.5-inch hard drive featuring 1TB of storage capacity per disk platter, breaking the 1TB areal density barrier to help meet explosive worldwide demand for digital content storage in both the home and the office.

Seagate’s GoFlex® Desk products are the first to feature the new hard drive, delivering storage capacities of up to 3TB and an areal density of 625 Gigabits per square inch, the industry’s highest. Seagate is on track to ship its flagship 3.5-inch Barracuda desktop hard drive with 3TBs of storage on 3 disk platters – enough capacity to store up to 120 high-definition movies, 1,500 video games, thousands of photos or virtually countless hours of digital music.

The 3TB drive will be available mid 2011