The data retention period specifies how long you can keep the events, logs, and some records SYS server, such as recording tags, face comparison data, vehicle entering/exiting records, etc.

1. Click System > Storage > Data Retention Period.
2. Set the data retention period from the drop-down list for the required data types.
   Figure 1. Set Data Retention Period

   Note:

   • The person access records are the access records on the card readers of doors by credentials.

   • The device recorded data includes the data recorded by the access control devices, elevator control devices, video intercom devices and alarm inputs of these devices, and other records except access records on the doors.

   • The person access records and device recorded data are saved as the configured period. The user with the permission can search the persons' access records and the device recorded data, even if the searched persons have been deleted from the SYS server.

3. Click Save.