My Book for Mac Fails to Back Up

I bought a My Book 3T external drive a year ago. It’s recently failed to back up using Mac Time Machine. Today, after it failed to back up, I ran Disk Utility First Aid but it failed to repair the problem. I then ran the WD Utility’s “Quick Drive Test” and it failed. How to initiate getting a replacement for this drive that hasn’t lasted a year?

Please advise how to obtain a like-kind replacement.

Hi @wcamp,

I would suggest you to perform an extended/complete WD Drive Utility test, If the test result shows drive failure, I suspect that drive is faulty/malfunctioning.

Please contact WD for Technical Support:

Thanks for getting back to me, Neha, on my inquiry.

I’ve done as you asked. I’ve run the “complete” drive test overnight and see that it passed. Here’s the screenshot.

Although the “complete” drive test passed, the “quick” drive test failed. More importantly, the drive no longer backs up my OS files (while my auxiliary"My Book Studio" (see screenshots) successfully backs up files.

What do you suggest I do?

Thanks, in advance.

Hello, again, Neha:

Five days have passed without receiving an e-reply from you or another WDC tech supporter.

I need to have this external drive repaired or replaced so I can safely back up my machine’s files.

Please tell me what I need to do. Thanks, in advance.


Sadly, another four days have passed without Neha or another WDC support member advising me how to initiate a replacement of this defective My Book external drive for Mac. Pleeeeze advise me of the next step to take. I must back up my OS ASAP!

Thank you very much.


Hi @wcamp,

Please refer to this link: How to Get an RMA to Replace a Defective Product, Obtain a Power Supply, or USB Cable for a WD Product

Also, please contact WD for Technical Support for drive warranty and replacement: