If you are looking for a way to get more out of your MacBook or MacBook Pro, consider a solid-state drive (SSD). SSDs offer faster data read and write speeds, fast file transfers, speedier boot times and will save you some battery life. In the past, SSDs were considered somewhat pricey upgrades and out of reach for many users. Today, prices are dropping and quality drives can be had for a song through retailers like Amazon and OWC.
Today I will show you how to install an SSD, specifically the Samsung 840 series into a June 2012 MacBook Pro. The proceedure in this tutorial video will work for any SATA-based Mac notebook with a few monior adjustments to the physical installation of the disc.
Keys to Success
Remember: before doing a full hard-disc transplant, make a full backup of your computer. Rather than restoring from a backup to a new drive, I used Carbon Copy Cloner and a Seagate Thunderbolt Adapter to clone my internal drive's contents before installing the new SSD. If you don't have a Seagate Backup Plus drive you can pick up a universal drive dock or Notebook Hard Drive Upgrade Kit for about US$30. They're nice to have around anyway.
This whole upgrade process is super easy and you should be able to complete it in a few hours depending on how much data you need to transfer. Now go forth and do yourself a solid.
Disclaimer: Note that opening a new MacBook Pro won't void your warranty, but replacing stock parts with your own third-party parts will void the standard Apple warranty.
Apple MacBook Pro 15-inch with Retina Display (mid 2014)