The present invention may be used in systems for non-volatile memory storage of electronic data. A first substrate member may have a first and second surface with a first and second substrate connector spaced apart and attached to the first surface and a first and second spacer element spaced apart and attached to said second surface. A NAND flash controller device may be mounted on the first surface and connected to the substrate connectors and spacer elements. Multiple NAND memory devices may be mounted on the second surface and be connected to the NAND flash controller device. A second substrate member may have a first and second surface with multiple NAND flash memory devices mounted on at least one of the surfaces. The second substrate member may be attached to the spacer elements on the first surface and said multiple NAND flash memory devices may be connected to the NAND flash controller device.