Before searching for “grundig sonoclock 890 web firmware update repack download,” consider these dangers:

Plug the device back in and power it on. It should automatically detect the file and show a progress bar Wait for the " Firmware Update Completed " message. Do not unplug during this time. Restart by holding the Update via PC Connection (USB Type B)

Extract the firmware file to the root directory of your USB drive. Power off the radio completely (unplug the AC adapter). Insert the USB drive into the rear service port.

The "repack" often refers to a community-modified firmware or a local server setup designed to bypass dead manufacturer links. Key technical discussions around this device include: