Hi [NAME] welcome to this user to user discussion forum. This is not Dell Support.  Support for Alienware Area-51m R2 Storage says install M.2 PCIe NVMe Gen3 x4 cards and 970 EVO NVMe M.2 SSD 1TB says it is a PCIe Gen 3.0 x4, NVMe 1.3 card. There are no compatibility issues. Speculate that you want to upgrade your 500GB OS(C:) boot drive to 1TB. Please clone (copy) your existing OS(C:) boot drive onto the 1TB NVMe card using Macrium Reflect Free. There are tutorials on YouTube.    Please click on Kudos to say thank you for response from user that is not employed by Dell. Please share an update on progress, so that other users derive benefit from your experience. Thank you. 
Hi guys,  I'm looking for advice on upgrading my SSD from a 500GB to a Samsung EVO 970 1TB. I've got the service manual which shows it as a simple procedure, but it doesn't mention anything about the files saved on it? Do I need to transfer the Dell and Windows files to the hard drive before I install it? Or will the files just automatically reinstall after I restart the laptop. TIA 
Area-51m R2, Samsung EVO 970 1TB SSD upgrade