I updated GRUB this morning (sudo update-grub) and got an error which goes like this:
/usr/bin/grub-probe: warning: unknown device type nvme0n1.
This "unknown device type" is my M.2 PCIe drive. I was just wondering why I get this message, because I otherwise don't have any trouble using this drive. /dev/nvme0n1 is the default boot device and has Manjaro GNOME installed on it. And just in case it matters, I have Windows 10 installed on another drive (/dev/sda).