320GB 2.5" Hard Drive for Compaq Presario CQ61-420SQ CQ61-420TU CQ61-420US CQ61-421ER CQ61-421SA CQ61-421SG Laptops Interface: SATA, Capacity: 320GB, 5400RPM: 5400RPM, Cache: 8MB, Size: 2.5 Inchs, 3.0Gb/s Package Include: 320GB 5400RPM Hard Disk Drive This Product Has 3 Years Manufacturer Warranty And 14 Days Money Back Guarantee