The purpose of recording photos and videos to the ST-16 is something frequently misunderstood.
The ST-16 cannot store a large volume of image data as the memory storage for that function is very limited. The system continuously overwrites old image files with new as capacity is achieved.
The ST-16 image files are lower resolution than what is recorded on the camera’s SD card. The SD card files are what is intended to be used for “production” purposes while the files on the ST-16 are present for quick, general review to assist scene framing, establishing the intended scene capture met objectives before moving on to the next scene, review lighting, etc., without having to remove the SD card for playback review. Essentially the ST-16 imagery files act more as a photographer’s assistant that expedites the work flow, not a final product grading feature.