Hi [NAME] welcome to this free user-to-user Alienware laptop discussion forum.  Please click on the following link Alienware | Memory RAM & SSD Upgrades | Crucial.com, Internal SSD, to confirm that SSD CT2000P5PSSD8 is compatible with Alienware m15 R7 laptop.  
I bought an Alienware m15 R7 laptop and I'm wondering if the "Crucial P5 Plus 2TB PCIe Gen4 3D NAND NV Me M.2 Gaming SSD, up to 6600MB/s - CT2000P5PSSD8" is compatible with the laptop in the D drive. Thank you again for all your help and time!  You can search the name on Amazon since they won't let me put a link.
m15 R7, Crucial P5 2TB compatible SSD?