If you have found the correct .bin or .dat file, follow these steps to install it: : Format your microSD card to FAT32 .
If you are searching for the specific file, these sites often host legacy dashcam drivers and firmware: Howto update your dashcam firmware
: Most units will automatically detect the file and begin flashing. A red light may blink during this process; do not turn off the power until it reboots, or you risk "bricking" the device.