Seagate Momentus 7200.4 ST9500420AS 500GB Internal Hard Drive (6.4 cm (2.5 inches), 7200RPM, 16MB cache, SATA) black (accessories)
I have the hard drive installed in my Macbook Pro 13 "mid 2010 to the slower and to replace the original smaller HDD. Speed increase is noticeable yet, unfortunately, but the volume of the plate in the aluminum housing is quite annoying Mac. While