Forget Pasword

I have WD My Passport Ultra …
i already change the pasword but i forget it…
how to solve it…?

If you retry a password wrongly a few times you should get an offer to reset (format) the drive. That will remove the password and allow it to be used again, but all the data on it will be lost.

As you are warned when you set the password originally there is no way to recover a password and maintain the data on the drive.

If you have it stored on any PC you have previously used the drive with though that PC may be able to auto unlock the drive so you could move the data off to somewhere else before doing the reset.