MYBook Essential - Windows Backup Fails - Device I/O Error

Hi, I have a 3TB MyBook Essential just out of the box.  I plugged it in to my Win7 (64bit) HP computer (USB 2.0).

My computer recognizes the drive and assigns a drive letter appropriately.  I can navigate to the drive without problem.

However,  Windows Backup continues to fail after about 5 hours with a Device I/O error.  I have verified the firmware, tried to reformat the drive, but, nothing works. 

Any ideas?

Thanks,

Donna

Try running a test with DLG.

http://wdc.custhelp.com/app/answers/detail/a_id/940/session/L3RpbWUvMTM0MTYwMDE2OC9zaWQvZmQ1SE90Kms%3D