What You Need to Know before Upgrading the HD of your MacBook

A reader from xlr8yourmac failed to install a 200GB 2.5" Fujitsu HD in his MacBook due to the larger than expected thickness of the drive.
This is a good opportunity for us to remind you that there are 2 standard thicknesses for 2.5" HD. First, the main one with its 9.5mm used by most manufacturers, and the second one set at 12.5mm. HDs with such thickness could be installed in previous PowerBook, but not in MacBook, and such drive are also used by some PC manufacturers. So remember to check for the thickness of the 2.5" HD you want to install in your MB, as larger storage capacity can be achieved with 12.5mm 2.5" HD as one can stack an additional plate inside.
Last but not least, since Intel transition, all HDs in MacBook are using SATA format 2.5" HD 9.5mm.