I have a MacBook Pro and have installed Windows 10 on Bootcamp to an external drive. The drive is a USB 3.1 enclosure designed to house an NVMe drive (in my case a Samsung PM951 which has approx 1GB/s speeds) When booting natively into Bootcamp on this drive and running Crystaldisk I am getting 900MB/s read and write speeds. Under MacOS I have a Parallels VM setup with this drive set as the hard drive on the NVMe1 virtual interface. I only get around 150MB/s read write then. Anyone know why this might be or how I can speed things up?