wd blue sata ssd m.2 2280

I've come back to building PCs and not sure if I understand the new M.2 SSD formats. I've got a Gigabyte H610M S2H and a WD Blue SATA SSD M.2 2280 but the mobo won't recognise it. The spec on the motherboard says 1 x M.2 connector (Socket 3, M key, type 2260/2280 PCIe 3.0 x4/x2 SSD) but I'm...