This one way for unlocking your WD passport but assume you will lost your data
Download wdsmartwareupdate here : http://www.wdc.com/wdproducts/wdsmartwareupdate/
Download instructions :
1- Locate you WD disk entry, click on Windows or Mac according to your operating system.
2 - Click on Download now link at the bottom and download the soft.
Unlock instructions :
1- extract the zip file you've downloaded en run the.exe.
2- select Continue to update and accept Licence Agreement.
3 - Next select Update Firmware
4- Check the check box "I understand ......" under Warning section, a button "drive erasure" will appear.
5- Click on drive erasur button
6- Wait until the end of the process and quit
7- Unplug/turn off the passport and plug it back in. Your WD passport is unlocked