I should have researched this more! Based on others' advice, I bought the Drobo 5C. It's not too late to return it though. All I need is something simple, I think. I have a new iMac with a SSD 512GB drive on the way. I need about 20TB of external storage for media (video and photos) and backup, plus room for expansion. I presently use a 5-year old Startech 4-bay enclosure. It is fine for my needs but it's on the blink and is failing. I also didn't realize that I can't put my present drives into the Drobo without formatting - that means I have to transfer my data. I'm wondering if I should replace my Startech with another Startech or if there's a better option. Or should I just keep the Drobo?