Updates often add support for newer video and audio codecs.
Confirm the update and wait patiently. The projector will process the file, and the device will restart automatically once finished. Do not disconnect the power or remove the USB drive while this process is happening. How to Bypass Firmware Limitations (Better Solutions) Unic Uc40 Projector Software Update Download
Copy the downloaded firmware ( .bin file) directly onto the root of the USB drive. Do not put it in a folder. Updates often add support for newer video and audio codecs