Western Digital WD1500AHFDRTL Raptor X 150GB SATA/150 Hard Drive 150 GB SATA 3.5-inch internal hard drive with crystalline polycarbonate lens for full view of inner workings 10,000 RPM spin speed; 16 MB cache Native command queuing (NCQ) for increased data transfer Hold up to 42,000 digital photos; 37,000 MP3 files; 3,700 uncompressed CD-quality songs; 11 hours digital video 5-year limited warranty