Xbox Preview Destroy my Externals HDD

What are you using the external HDD for (Games & Apps or External Captures)? Are you in the Dashboard Preview program?

If External Captures and yes to Dashboard Preview then please use the report feature of the Xbox Insider app to let them know about your issue. My console is in Preview Alpha and I noticed that the last update seems to have affected how it sees my External
Capture HDD.

If your console isn't in Dashboard Preview then try connecting your HDD to a computer to see if it's recognized there. It may be a coincidence however unfortunately HDD'S do die eventually.

Hey there Atomic Sh0cKer!

Sorry to hear that you're having some trouble with your external HDD. Please be sure to check out my st above referring folks to the Preview Forum. They'll be able to best help out with any issues while taking part in the Xbox One Update Preview.

There are some issues with external HDD in the preview program, As you are in the program you should post there to get the help you need.

Just had this problem with my new Seagate Expansion drive, problem turned out to be the USB 3.0 cable included with the drive, it was not connecting at USB 3.0 speeds, triggering the error message you are seeing. Purchase a high quality USB 3.0 A to micro-b
cable online or from a computer store, may not solve the issue for everyone but it's not a very expensive step to try if no other suggestion is working.

Nevermind. I just kept repeating everyting (rebooting, unplugging, replugging, rebooting) until it finally worked. As long as it continues to work, I don't care what the problem was.