Both are the same brand and are capable with the laptop. I've had the 500 gb version of this Samsung NVMe M.2 ssd for years with no issues and just today I tried installing a 2 tb version of it and it didn't read it. Afterwards I tried installing the old one and now it doesn't read that one either. The slot and prongs to it look brand new (to a newbie at least) . I've tried several solutions and work arounds that I've found but unfortunately none seemed to help. At this point I may take in a shop to take a look at it themselves but I am open to suggestions. Please and thank you for any assistance.