Wishlist Quick view WESTERN DIGITAL WD Caviar Blue WD6400AAKS 640GB 7200RPM SATA 3Gb/s 3.5" HDD $49.56 $34.18 WESTERN DIGITAL WD6400AAKS CAVIAR BLUE 640GB 7200RPM SATA-II 16MB BUFFER 3.5INCH LOW PROFILE (1.0 INCH) INTERNAL HARD DISK DRIVE. DELL OEM. REFURBISHED. IN STOCK. Compare Add to Cart Add to Wishlist