As I explained in this thread HiLook DVR-116Q-K1 Can't disable beeping for HD Error exception?, the DVR didn't overwrite the HDD once it was full, but deleted all videos and generated an HDD error exception. I formatted the drive and there's free space again, but of course I don't want to do this everytime it fills up, neither I want to all videos deleted, just the oldest ones. Does anyone know where to turn this feature on, supposed it's supported by my device?