Would love some experienced advice on this. Background: I'm a photographer with very large Lightroom photo libraries and perform high-end retouching in Photoshop. I shoot most weekends and spend very little time deleting unwanted shots, needing to focus my available time on the selected shots. I want to get in to video editing. 1080p for now maybe 4k in the future. I'm still deciding between Final Cut Pro and Premiere but perhaps that's irrelevant for the question below? Either way, I'm going to need fast read/writes for a smooth editing experience. How fast, I don't have an experience to know so hopefully you can advise. The mac: Classic Mac Pro 3.33 GHz 6-Core 32 GB 1333 MHz DDR3 NVIDIA GeForce GTX 960 4095 MB 6x SATA storage bays (4x slot loading + 2x extended from motherboard sitting in optical bay) 1x PCIe SSD controller with 2 bays (Apricorn Velocity Duo X2) 1x PCIe 4-port USB 3.0 card The available drives: - 960GB SSD - 480GB SSD - 240GB SSD - 240GB SSD - 1TB HDD 7200rpm - 1TB HDD 7200rpm 3x 500gb LaCie USB 3.0 Externals 2x 1TB LaCie USB 3.0 Externals 1x 2TB LaCie USB 3.0 External Current arrangement: Startup disk - 240GB SSD (write: 110MB/s read 265MB/s) 480GB Software RAID 0 - 480GB SSD - 240GB SSD (write: 460MB/s read 520MB/s) Slow occasional access storage - 1TB HDD 7200rpm (write: 115MB/s read 155MB/s) Slow occasional access storage (large iTunes library etc.) - 1TB HDD 7200rpm (write: 120MB/s read 110MB/s) Sitting in LaCie USB 3.0 enclosure for light, shock resistant mobile storage - 960GB SSD (write: 245MB/s read 265MB/s) The question: How do I make the best and most sensible use of the storage space available?? As you can see I've got an awful lot of gigabytes available across drives of varying sizes. The Apricorn Velocity Duo card hasn't arrived but once it's here I'll have yet another 2 "bays" available and they'll be the fastest in the system. Should I RAID two SSDs off the Apricorn and use that as my startup disk? Or continue booting off a single SATA SSD and use 2x SSDs on the Apricorn as a super fast working space for the video media? I'd also like to make sure all drives are well backed up. Time Machine works well for me but I don't have a single drive to cover the sum of all internal drives. The possibilities are myriad and I'm at a loss as to where to start! Please help.