Hello, this are my current specs: Aorus B450 elite, Ryzen 3 3200G, 1 stick of 8gb ddr4 3200mhz ram, ADATA SX6000LNP.We're going to need a lot more information than this. What the NvME is, what the rest of your hardware is, what was the circumstances you installed it, how you installed it, what you specifically mean by "showing up" in windows (file explorer? disk management? etc.), and what you specifically mean by can't access it.