gl553vd

I'm wondering would the stock hdd can be upgraded to sshd as the hdd frequently stop working and displaying the blue screen off death while I'm doing my work? Thanks in advance!!

When i first bought this GL553vd laptop it was already been equipped with a 128 ssd, im not sure what type, it came up with the laptop. And i was planning to install a sx8200 512 gb ssd into my system (a new one), does this means i have to replace my 128 gb ssd ? or will it have an additional un...