hello ! I am looking at a new 2017 laptop and I have come across m.2 , the laptop I am looking at has a 128GB SSD SATA 300 and a 1TB Serial ATA 5400rpm, I am trying to understand what the 128gb ssd is used for? and will it have windows10 installed on it ? also if it does not would it be better for me to reinstall windows 10 on to the 128gb ssd .