I have a Mac mini 2012 i7/16 GB RAM/1TB HD and I want to upgrade it. I intend to use a 480 GB SSD Kingston (is it good?) and I am wondering if it's better to use it externally within a case to not open the Mac Mini to change it for the normal HD or if the correct one is to use the SSD internally and use the old HD externally within a case. Taking the opportunity, I am also considering to buy more RAM ( 2 X 16GB) but I do not know if it's worth it. What do you think about this? Thanks in advance.