I have done a whole weeks worth of research and tried everything, nothing works. I have rebuilt my computer recently and installed 10 drives in it. Config: Asus ROG Strix Z270 Gaming MATX board i7 6700k 16GB 2400 RAM 1TB Samsung EVO 970 NvME EVGA 650w G2 NVidia 1060 3GB 9x various sized hard disks (platter) Fractal Design Node 804 case Marvell 88SE92xx based sata expansion card with 4 Sata 6G ports non raid I am not the most competant hardware wise, but I usually resolve things by research and trying new things out. This problem is not going away. The mobo has 6 Sata ports of which one is disabled as I used one of the nvme slots. I bought the sata controller card because I needed to add 9 more drives in there. I am using pretty much all the ports available to me now. The problem I am having is that all the drives connected to the Marvell Sata controller are showing as removable drives. I have done everything. The registry editor fix, getting latest drivers for marvell etc etc etc. The sata controller shows AHCI passthrough via boot up and I have not been able to access the settings for the controller (not sure I can anyways as its an expansion card connected to PCIE) I have also tried to make a single volume by combining all the drives on the marvel controller with MS storage spaces, it doesnt let me do that either. I have pretty much exhausted all options that I researched. I am at a loss. Any help is appreciated. I am considering getting a better expansion card perhaps from Intel but I am at a loss right now. Help please?