Lost all the data in my WD 1 TB My Passport. How do I recover the lost data?

WD External Drives WD Portable Drives
2

Hi Rajesh257, sorry to hear you loss access to your files, it is probable that your files got corrupted. I recommend you to use  a data recovery problem, using Google you should be able to find several options. If the data recovery program does not work, you can contact any of the data recovery partners on the WD support page. 

http://support.wdc.com/recovery/index.asp?wdc_lang=en