Hello, I have a Mac Pro 6,1 (cylinder) and I want to setup an external working drive for my photography and videography. I would like to create a RIAD drive out of M.2 SSDs or mSATA SSDs. However, since my computer does not have a way to expand its PCIe lanes I am not sure how to go about doing this. There is this PCIe add-on card that could host 4 mSATA SSDs but I do not how I would connect it to my computer. I could just buy a USB 3.0 enclosure to use with a M.2 SSD but that would severely cripple the speed of the drive. Does anybody know a way to connect either a PCIe add-on card, or an M.2 SSD, without loosing so much speed?