The HP 500 GB 7200 rpm Primary SATA Hard Drive is a convenient and affordable solutions for users who require additional storage or a faster dedicated second hard drive. Extend the life of your HP Business Notebook by providing additional storage. Hardware compatibility: HP ProBook 430 G1, 440 GO, 450 GO, 470 GO, 445 G1 , 450 G1,470 G1, 640 G1, 650 G1, 645 G1, 655 G1, 4440s, 4540s, 4740s, 4445s/4446s, 4545s, 6470b, 8470p, 6570b, 8570p; Notebook PCs HP EliteBook 820 G1, 840 G1, 850 G1, 2570P, Folio 9470m HP ZBook 15 and 17 Mobile Workstations; HP EliteBook 8570w and 8770 Mobile Workstations.