Reformatting a My Book World Edition 2 Tb drive

WD Legacy Products Other Network Drives
2

You can use the factory restore option to erase all files.

How to reset the WD ShareSpace or the WD My Book World (White Light) drive

http://wdc.custhelp.com/app/answers/detail/a_id/2683

Make sure to backup all of the important files before performing the restore.