Hey all, a couple months back I posted about upgrading my early 2009 for light to heavy photo editing. After playing around I've determined I'm not going to be able to get this machine to do the lift I need for photo editing. Alas, I've decided to resurrect this machine (which I've hardly used the past 5 years) to be a music server and dvd player. I have the mini running into a 24" lcd tv with audio going through my stereo system. I'd like to continue to use the mini as storage for my digital library and as a dvd player. I've cleared out all other files off the hd and don't have it connected to wifi. Here are my questions regarding upgrading for optimal performance and life: 1. I do need to upgrade RAM -- I'd prefer to do the bare minimum needed. Any opinions on whether a single 4gb card will be enough or should I max out the full 8gb capability. Is there a way to specifically determine what I need before buying? 2. Storage: I have the original hd with, I believe, 160gb storage. Any reason that simply connecting a 1TB external hd would cause any issues for audio playback? On the one hand, I'd prefer to spend as little as possible as I am saving money for a new photo editing machine but if I'm already opening her up to upgrade RAM I might as well do storage upgrade at the same time. 3. OS: Is there a preferred OS. If my mind serves me correctly the early 09 can't upgrade pass El Cap, of which I don't prefer to do anyway. I'm not planning to have this connected to wifi ever except to possibly download a new media player. Thoughts? I appreciate the help.