This parameter is mandatory when Backup mode is set to Recording.
Indicates the recording segment to back up on the backup source MPU. For example, MPU 1 in city B needs to back up historical recordings from 10:00 to 12:00 every workday to another MPU.
Start date: Indicates the start date of recordings to back up on the backup source MPU. For example, MPU 1 in city B needs to back up historical recordings from 10:00 to 12:00 every workday from November 23, 2016 to another MPU.