You can purchase a service card based on your requirements. For example, if you purchase a 7-day event card, the cloud stores your videos from the latest seven days and deletes the videos that have been stored for longer than seven days.
Event cards and continuous cards are different in how they trigger the video upload. An event card uses the event triggering mechanism, that is, when a device detects a change in a video image, it uploads the video data to the cloud. A continuous card uses the continuous upload mechanism, that is, a device continuously uploads video data to the cloud 24 hours a day.
The service may be valid for one month or year. Within the service validity period, you can view videos stored on the cloud.