Password does not work anymore!

I have been using my passport 1T for many years with the same password, but since yesterday I cant open it. I didnt change the password but I have an invalid password request.
I also used WD security with different pc. always the same result

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Hi @kiyas,

Please refer article of WD Security ā€œInvalid Password Messageā€ or Password Forgotten:

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its happening same to me, it stops recognizing my same password if i donā€™t use it for a time like 1 month. even i have tried to write the password so that its not me who forgets the password but drive will say invalid password after long time of not using. iā€™ve to format every time and set password again but if i login next day it will work but after some time of not using it loses the password. i donā€™t know why this happens even RMA drive has this problem.

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These instructions are out of date. WD Security no longer offers to erase the drive after 5 wrong guesses. Can we get the current instruction for formatting a locked drive?