Update:
As for Q1, I found my answer here: Success recover my MyCloud 3TB with fast blue blinking light after update firmware!
Caveat: there’s no scp in busybox, just ftpput. Gotta live with that in case you’d like to save things out of the NAS before attempting to fix it.
As for Q2, I fixed it with the procedure from the same post: Success recover my MyCloud 3TB with fast blue blinking light after update firmware!
I then first applied firmware My_Cloud_GLCR_2.41.116.bin in safe mode and it came up. Then I tried going to My Cloud OS 5 again (automatically, just clicking on the dashboard icon) and it worked this time. Maybe WD folks fixed 5.11.112? Anyway, the thing works now.
Pointer to usbrecovery.tar.gz that works: GitHub - mcmetrox/wdmycloud-gen2: Files used to setup the software of a WD MyCloud Gen2 device
Thanks and may God help you in case this happens to you.
