4TB Passport Displays as "Unallocated" in Disk Management, Does not Show in File Explorer

Help!

My 4TB Passport external drive (purchased recently via Amazon) is no longer recognized when I plug it in. I’ve tried this on three different computers, with different operating systems (Win10, Win7, Linux) and using different cables, always with the same outcome. When plugged it, it will spin up. A minute or two later, on my Win10 machine, a “This Device is Not Recognized” error will pop up.

When I open Disk Management, it sees the drive as “Disk 1”, Basic, 3.77GB, Online, with 3.77GB “Unallocated.”

The main HDD on my computer crashed during a Win10 update and I had to hard-power it down. I lost everything on that (very old) drive, and I thought “no problem - I have my brand new WD Passport here with everything backed up on it.” I get Win10 reinstalled (a new internal drive), plug in the external, and was shocked to see the error above. It doesn’t make sense - my computer was not writing to my external when it crashed while doing a Win10 system update on the primary, internal drive. Yet here I am, with my backup now appearing as “Unallocated.”

Asking Windows to check for updates for the driver (R-clicking on the drive in Disk Management, selecting properties, and going to the Driver tab) results in no updated drivers found. At the same time, it says the driver date is 6/21/2006 - how can that be right? Is there something I can do that would help?

I’ve heard that some people sometimes have luck by updating (or even rolling back) firmware. Might that help me? Could it completely brick my drive?

Please help!

“Unallocated” means there is no writable partition on the drive

so, it sounds like the partition got corrupted.

not many options apart from reformatting the drive … try running chkdsk ?

@JoeySmyth
Thanks! Been a while since I’ve used this kind of utility. How do I get chkdsk to run on this drive that doesn’t show in File Explorer?

Also, I just tried running it (don’t have my faulty external attached). It ran and then closed the window automatically before I could even finish the first two sentences above. How do I get it to stay open so I can see the results?

Thank you,
Chris

And any thoughts on the firmware option? I don’t want to brick the drive completely… but someone who knows a lot about drives has heard that this can work sometimes. I don’t know if it’s rolling them back, reinstalling the same thing, or installing the latest and greatest.

@JoeySmyth Meant to tag you in the items above. Tried editing to add you to the first one but I’m not sure that notified you? (Sorry, new to these forums and how they work…).

Thank you for your initial response and your patience with me!