I have a “WDMyCloudDL4100”. I’ve followed the steps found on both links
I’ve made sure to update my firmware first to 2.41.116
After reboot, I then clicked on the alert to upgrade to “My Cloud OS 5”
The screen shows the FW downloading.
However, when it gets to the “Upgrading” status, it hangs on “(-1%)”
I then downloaded the OS 5 FW
Version: Firmware Release 5.15.106 (7/13/2021)
and manually attempted to apply.
Webpage shows it “downloading” from my desktop.
When it attempts to Update, it fails with “Upload firmware failed. Try again.”