I'm finally replacing the 750 GB HD in my 2012 MBP 15" to a 500 gb Crucial SSD. I'm going to transfer the original HD to my optical bay as well. (the adapter for that is coming same day as the SSD). Once I get the original HD into the optical bay will all of my apps and everything still be on the computer after I set up the SSD as the boot drive? If not what will I need to do? I also plan on replacing the original 750 HD to a 1TB HD because I want the extra space. Whats your recommendation for a quiet and fast HD?