WD Blue 1TB 5400 RPM 128MB Cache SATA 6.0Gb/s 2.5" 7mm Laptop Internal Hard Drive2. 5 Inch SATA III 5400RPM Up to 128MB Cache 2 Year Warranty Solid performance and reliability for notebook computing. WD Blue hard drives deliver solid performance and reliability while providing you with all the space you need to hold an enormous amount of photos, videos and files. These drives are designed for use as primary drives in notebooks and external enclosures. WD Quality. Built to the highest standards of quality and reliability, these