In my laptop I have an NVMe as my main OS drive and an 850 evo as my secondary drive. CrystalDiskMark shows speeds half of what you'd expect from an 850 evo, and Speccy says that the drive is using SATA II transfer speeds. Is this a case of both my drives sharing bandwidth and slowing each other down?
Here's a picture of my configuration: https://imgur.com/a/rH6h6
Here's a picture of my configuration: https://imgur.com/a/rH6h6