My EX4100 spinning endless on safemode recovery

I have a My cloud EX4100 with 4 hard drivers already updated to OS 5 version 5.15.106 with the red light that keeps blinking. After upgrading to OS5, I can’t access the dashboard. When I try to re-upgrade, there are stuck at safemode recovery web and the process cycle still spinning. I also can’t connect thought by SSH. The screen said that “Firmware update failed”. I also try to reset with 4 and 40 second method, but both of them did not work. So there are another way to fix the hard brick situation with USB flash driver?

Hi @Hungaq,

Please refer to the article of My Cloud Firmware Update Failed Message:

Hi @Keerti_01 ,

Thank you so much for your guide, unfortunately, there is no work in my case. I still can’t reset with the 4 seconds and 40 seconds method. I also can’t recover in the current safe mode recovery too. So, there are any other ways to replace the OS in the EX4100 NAT device?


I appreciate that you have performed the troubleshooting steps.

Please contact the WD Technical Support team for best assistance and troubleshooting:

Hi @Keerti_01 ,

I also create a ticket and email reply from My incident number: 220224-002580.

Collins D was send me a email to guide on fix problem. Unfortunatly, the guide was not working.