The world's most feature-rich 2.5-inch drive for laptop upgrades and external enclosures. The Momentus drive family offers innovative options, capacities to 750GB, two performance speeds and significant feature options. 7200-RPM and 5400-RPM speeds and 8MB and 16MB cache size to increase application performance. Seagate SmartAlign™ technology provides a transition to 4K sectors without the need for software utilities. Optional FIPS 140-2 Validated™ Seagate Self-Encrypting Drive technology delivers government-grade encryption without performance degradation - protecting your data where it lives. Optional Seagate G-Force Protection™ technology can detect when your laptop is in a free-fall, swing the drive heads to a safe zone and keep the data safe.