Password requirements for WD SmartWare Drive

Hello, I am trying to access my drive and do not remember the password. The system did save a hint that will help me guess the password, but I am looking for password requirements to help me figure out what the password might be (how many characters, capital letters, special characters, etc). Product: my passport. P/N: wdbaaa2500abk-00. Any help is greatly appreciated!

i have the same issue the WD security Installer gives no op option for forgotten password