I purchased a msi GL62M 7RE-407 and it just came in today. When I read about it online I was under the impression it came with the 256gb m.2 SATA SSD. I looked on the ssd slot and it's empty. I've been looking online for some and apparently there are external and internal SSDs. I'm not sure which one I need and just by looking at the laptop I can see that it looks like a normal SSD card slot but I've never messed with anything like this before..