Wireless has cloud storage features which can help you to get the data instantly. Generally, the wireless IP camera has cloud storage features that enable the camera to store the information securely. Many other security cameras have in-built micro SD slots that allow the camera to store the data successfully.
However, when the memory card gets exhausted, you need to transfer the data somewhere else to continue recording in the future. That is because many updated versions of security cameras have an auto-delete mode, which can delete the stored information once it is full. That can be dangerous, as you may lose your valuable data.