The Seagate Momentus 5400.4 drive offers the best combination of capacity, mobility and durability in a laptop hard drive and features reliability-boosting second-generation perpendicular magnetic recording (PMR).By utilizing Seagates second-generation PMR, the Momentus 5400.4 drive delivers unmatched capacity along with exceptional durability. And with a powerful 3-Gb/s SATA interface, this drive will be able to keep up with today's demanding digital world in mainstream laptops, workstations, gaming laptops and personal external storage.