Many people come to the MacBook Pro forum asking about SSD upgrades, so this user tip is applicable to those, primarily, who have already made the decision to upgrade. If you’ve already upgraded your RAM and simply want more speed, you may want to consider upgrading your old hard drive with a SSD (Solid State Drive). There are, with most MacBook Pros (exclusive of the Retina display models) only two modifications that you can make without voiding your Apple warranty or AppleCare extended warranty – upgrading the RAM and upgrading the drive in the hard drive bay.
(Note: while some portions of this user tip can be used when installing a new hard drive in your MacBook Pro, it is intended only for those upgrading to a SSD.)