Hi, I have an HP Pavilion laptop. It has only 500 GB of inbuilt storage. I thought of adding another 500 GB and contacted HP support. They said, "Buy any M2 SSD ". I almost bought one but realised that there are green and blue ones and they are different. I think there is PCIe or Nvme. Not sure which to choose. I guess it is PCIe but not 100% sure. It would be nice if someone can help me with a method to identify which one fits my laptop. Thanks.