I shoot around 40 weddings a year, each wedding is around 30GB. I would like your opinion on my current workflow plan because I'm struggling with the concept of sequential vs random read/write times. My plan is to keep one wedding on my Fusion Drive in Lightroom, at 30GB, I assume the whole experience will be blazing fast. But my question is this : should I keep my other weddings on a LaCie Little Big Disk? Or on the 5400RPM HDD inside the iMac? The LaCie offers read/write times around 200MB/S via Thunderbolt. But apparently that's only true for sequential transfers. Random access is more like 1.5MB/S. Yikes. While I'm editing my main wedding on the Fusion Drive, there are instances where I need to access the other weddings momentarily, I just don't know if I would have fast access to these other weddings with the LaCie, can you guys help me understand? Thanks so much!