I installed a WD Blue 500G SSD in the M.2 slot. I do not see any indication that it has been recognized. Per the Wiki... which only shows the onboard MMC. This is the FriendlyDesktop, rk3399-eflasher-friendlydesktop-bionic-4.4-arm64-20180921.img Thank you for any ideas. root@NanoPC-T4:~# cat /proc/p...