The duration for which recorded images are stored on a CCTV system depends on several factors, including the storage capacity of the system, the number of cameras, the resolution of the footage, and the configuration settings. Typically, CCTV systems have different storage options, such as hard drives or network-attached storage (NAS), which determine the storage capacity. The length of time that recorded images can be stored will vary based on the amount of storage available and the rate at which new footage is recorded. It is common for CCTV systems to have settings that allow for continuous recording or overwrite older footage when the storage reaches its limit. It is advisable to consult the specifications and settings of your specific CCTV system to determine the storage duration under your particular setup.