6.4 is known for being lightweight on resources compared to newer, more bloated versions, making it a "snappy" choice for this specific hardware.
Potential inclusion of OSCam or CCcam configurations for smart card decoding. Status and Compatibility openatv-6.4-viper4kv40-backup-20230308_1712_usb...
As a "backup" file, it likely contains user-specific channel lists (bouquets), satellite positions (tuner configuration), and network settings. more bloated versions