Huh? I was just looking at a 32 GB flash (SD) card on Wally World’s site, for $9.00. Over 10 hrs of 720p video can be stored on 32 GB. Then, if there is any reason, anything needing review can stored on HDD, for roughly 18 cents per hour, and the card reused.
The labor needed to select, save, and then do any video reviews would be a far greater expense than the data storage....
Actually, 18 cents per hour is probably way too high a figure. And what caused that double post? Hmmm...