Thank you. I answered in FiiO Support email thread.

Dear FiiO, Thank you for the quick reply. Sure, I tried several times with several files downloaded one by one from the link above. Previous firmware could not be loaded as well with the same message. Could you please tell me how I can make sure that the file downloaded is the complete...

I had an issue while trying to update the firmware as described. The device did not wake up after the firmware upgrade. I went through the wizard steps, but at the last step the new firmware downloaded to the device failed to be verified. The upgrade process was finished, but the device became...