I am wanting to get an external hard drive system taht incorporates a Raid 5 system and USB 3 so as I can put my 4 x 4TB hard drives into it. Does any one know or use a similar system and can recommend what to use. I already have the 4 x 4TB hard drives and they are the standard 3.5" drives to fit in a standard external hard drive case. Raid 5 will mean that my 16TB will give me 12TB of actual memory.