I have a 2 TB iTunes library and growing. Today I use a Macbook Pro (Retina, 15-inch, Mid 2015) 2.8 GHz Intel Core i7, 16GB 1600 MHz DDR3. I have been researching external Thunderbolt storage options. I have looked at G-Tech, Western Digital, Buffalo, and OWC. Here is what I'm thinking and of course, cost is important. I would like a solution that can scale up to 8 TB, support Raid 5 (which means you can swap out a disk if there is a failure). I am thinking there could be an advantage to boot directly from the Thunderbolt storage solution with the iTunes app installed on the array. Is there a solution available and that markets to consumers?