Problem My Book Essential 1Tb *again*

I have had the exact same issue.  i have been using my 1TB Essentials on MAC with no issues. for quite a while  In fact I have 4 WD drives.  I received a notification to update my Firmware from WD for the Essential.  So I did…stupid me…I followed all the instructions to the letter.  When I rebooted my machine the Essentials stays on but I see no activity and it is not recognized as a USB device.  I can no longer access it, it does not power down by itself.  I am so pissed…**&*&^ I have written to WD,  lets see what the reply is…  I have lots of content that I do not want to lose.  I have read that I could get the drive out of the unit and read the data by attaching is physically to another PC…oh dear  WD…I am getting a headache…