Now I launched WD SmartWare without My Book attached and in Settings Tab manually checked for an update and it works without any errors without Book. It says up to date.
But I didn’t find there info about firmware version.
In the link You posted about drive firmware how to step number 11. After Exit:
Please remove the USB and power cable. Wait 10 seconds and then connect the power cable and USB cable>then Reboot.
I remember very well when I was updating firmware on screen was written other instruction
it said after Exit> Turn off PC> unplug Drive from power> Turn On PC>Plug Into power Drive.
So which instruction is better or it is the same thing?