It wasn't ideal but I had to buy my new 2017 27" iMac from Best Buy because I had a $900 store credit that I've been sitting on for a while. My ideal scenario would have been to get a BTO with SSD from Apple but then I'd have to pay more out of pocket. Clearly, that wasn't something I was willing to do. I opted for the mid 3.5GHz i5 with the stock 1TB fusion drive configuration. The machine outside of the Fusion Drive will serve me well. I want to swap out the 1TB Fusion Drive with either a 1TB or 2TB Samsung 850 PRO but will do so later this year as I expect better pricing during the holiday season. So I wanted to ask what's the best approach to swapping out the Fusion Drive as I haven't had a Mac with a Fusion Drive. I know that I'll have to open up the iMac in order to swap the Fusion Drive with an SSD but is this even recommended? What's the overall process to do the swap? My understanding is that I have to "split / break" the fusion drive before attempting the swap. What to do with the SSD part of the fusion drive that ships with the iMac? I won't need this after I swap in the 1TB or 2TB SSD. Any other considerations that I'm not thinking about? Thanks!