I will be getting an iMac 27" later this month or early next month and will have a SSD. Rather than getting a fusion drive, I'm looking for a thunderbolt external hard drive to hold all of my main files (documents, movies, TV shows, music, recorded songs for my band, etc.). It will always stay attached. I will everything that is not an OS file or an Application on there. I'm looking for opinions on what the best solution is. I was looking at having at least 4-6tb. The drobo looked enticing because it offers the freedom of expansion but I have hears mixed reviews on it. Which do you use and why? Thank you.