Additional SSD Dell Inspiron 15 7000 Gaming

Is it possible to get an additional internal SSD for the Dell Inspiron 15 7000 Gaming? So for example, if I were to get an additional SSD of 1 terra byte I would have 1.256 terabytes( 1 + 0.256 .) I wanted to know this because when opened my laptop up (unscrewed it) I noticed a space for an SSD.

Any advice would be greatly appreciated.

Cheers sirpain98