SR-20HD: Does the video recording loop back to the beginning (overwriting the video) when the SD card is full?
If the SD card gets full while you’re recording video on the SR-20HD, recording automatically stops. When recording video for extended durations, use a SD card with an appropriately large capacity.
SDXC cards can be used on the SR-20HD. Before you can use a commercially available SD card with the SR-20HD, you must format it as described in “Formatting an SD Card”.