Dear smith2019,
The default recording is not saved for more than 6 months; after that period the database will be automatically cleaned up.
If you need to set the recording record for more than 6 months ago, you need to modify the table data in the database for it not to clean up for a longer period of time. Table data retention time is uniformly controlled by t_icdmian_maintence.
Specifically, in order to modify the table data in the database it is recommended that customers call the Huawei TAC hotline to seek remote assistance. It is not recommended that customers modify it themselves.