Toshiba has produced a 2.5in hard disk which it claims can hold 200GB of data.
The drive is based on Toshiba's Perpendicular Magnetic Recording (PMR) technology and features the world's highest areal density at 178.8 gigabits per square inch.
Scott Maccabe, general manager at Toshiba's Storage Device Division, said that the company had listened to mobile PC manufacturers' needs for high-capacity storage in a small form factor.
"Our technology innovation in PMR has laid the foundation for delivering the industry's highest capacity and areal density in the standard mobile drive form factor," he said.
The 200GB dual-platter MK2035GSS is Toshiba's first PMR drive to incorporate tunnel magneto-resistive recording head technology.
The company said the drive weighs 98 grams and incorporates the Serial ATA II interface with native command queuing, enabling faster data transfer rates.
Toshiba debuted the technology at Computex in Taipei and plans to start mass production in August 2006.
Could be used for everything from search-and-rescue robots to wearable tech
Don't require the rare material being mined from the mountains of South America
IBM hopes that its new tool will avoid bias in artificial intelligence
Found by calculating the strength of the material deep inside the crust of neutron stars