I purchased a new MyBook Essential a couple of weeks ago. I formatted it to work with my Macs per your telephone support instructions. Now, when I plug it in, it will not mount. I have tried reformatting it and starting from scratch. It mounts the first time, but when I unplug it and then plug it back in to the same Mac or a different one, it does not mount. Now it does not even show up in OSX Disk Utility anymore, or in WD SmartWare.
What do I do?