Hello community, I've been doing research and I have seen many SSD vs Fusion Drive threads. However I'm torn between a 3TB fusion drive versus 512GB SSD because of the large space difference. I've been using my rMBP 2012 with 512GB SSD since and I love the overall performance. However 512GB was never enough for me as I work with large bulk of photographs and videos. The reason why I want the fusion drive because I want a seamless workspace of having an SSD and an HDD together. Knowing that the fusion drive is just 128GB SSD and the rest HDD I also considered going for the 512GB SSD and opting for an external HDD and always keep it in plugged. Would it be efficient for me to work on large bulk of images in lightroom where the files are actually stored on the external HDD? Would that give me similar speeds as working on a fusion drive HDD. I would love to hear feed back to those who decided to get the SSD and get an external HDD with their iMacs. Thanks for your time everyone!