I'm not sure exactly what those 'specked out' recommendations were . . . but you can add a second M.2 NVMe SSD to the XPS 8950 motherboard. [IMAGE]  
Hello, I did buy an XPS 8950 specked out much to the recommended. Thanks for the advice. I would like to add another internal SSD hard drive. I see Samsung EVO 1tb drives but does anyone know which one would be best for my computer?  Richard 
XPS 8950, internal SSD Samsung EVO?