"Kechaoda" might be a brand or model. I've heard that name before in the context of e-readers or maybe some kind of device. "A26" is likely a model number, so it's probably a specific product. "Flash file 2021" could mean software related to that device from 2021. So the user is probably asking for information about the software or firmware for a Kechaoda A26 device as of 2021.