Some of minor issues in it, can corruped all of data. I was coping data to the drive and my laptop crashed. I was unable to access the data and it was resolved only after 3 to 4 resets.
Suddenly power cut of the electricity completely can corruped the data. It can be a obvious cause because lots of time electricity has gone during operating and my laptop battery was no more. Hence after going electricity , laptop instanly goes off.
And this drive lost its data sometime as I have seen. A single power cut can wipe off all data, at least WD should have informed me and I would have installed a extra outher UPS.