I didnt realize that when I was buying because long time ago I bought 500 GB WD HDD and it already included software (and I can use lock-unlock function without problem). However, no software was installed on the HDD. I just bought a 1 TB WD External Drive (WD Elements SE 1 TB) to use for backing up business-related data and I need to use Lock-Unlock function (coming with WD Smartware I think)
