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 “Invalid Password Message” or Password Forgotten:

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its happening same to me, it stops recognizing my same password if i don’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. i’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 don’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These instructions are out of date.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?