My Book 3TB - Not Accessible/Offline

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I downloaded WD Backup 2 Days ago and ran it and it worked perfectly.
2 Days Later and I cannot see the drive on File Explorer and get this message.
The My Book is connected to a power source and my computer. I have unplugged and replugged serveral times.
The drive is password protected, but I cannot get to it to enter the password

Anyone have any ideas or suggestions for me?

Appreciate the help!

Hi,

You could refer to the following link: WD Backup: Target Missing or Drive Offline