I want to know if for the empty m.2 slot I have to purchase a nvme ssd or a sata iii m.2 ssd. I don't know which one is compatible, I researched on amazon's website and a question popped up saying that acer tested up to 512 gb of nvme. I want to add 1 tb nvme ssd to the already installed 256 gb ssd that came with the purchase. I have these options for ssd:
WD BLUE
https://www.amazon.com/dp/B073SB2MXT/ref=sspa_dk_detail_4?pd_rd_i=B073SBZ8YH&pd_rd_w=VkfYA&pf_rd_p=8a8f3917-7900-4ce8-ad90-adf0d53c0985&pd_rd_wg=FzSld&pf_rd_r=F9G7K44D78GG4RCTJTQF&pd_rd_r=be85a761-990f-11e9-af99-f7a03486ec91&th=1SAMSUNG
https://www.amazon.com/Samsung-970-EVO-1TB-MZ-V7E1T0BW/dp/B07BN217QG/ref=sr_1_30?keywords=ssd&qid=1561515251&refinements=p_n_feature_three_browse-bin%3A6797521011&rnid=6797515011&s=pc&sr=1-30They have different types of entries, I want to know which will work and if 1 tb m.2 ssd can work with the already installed 256 gb m.2 ssd. If I have to choose I'd go for the cheaper ssd, but preferably the one that works.