You can schedule content export to run at a regular frequency by selecting Recurring Export (Figure 1):
Figure 1 Recurring Export
Note: The default value is 24 hours, starting at 23:59:59 UTC. When programming your download process, please wait for the job to complete before retrieving the file
You can also export content manually by selecting Ad-hoc Export based on a date range, but it should not be run at the same time as a recurring export. The ad hoc export will contain data from 00:00:00 to 23:59:59 GMT on the selected dates.
Manual and scheduled jobs will have slightly different file formats. The format for the manual export file is below:
<export_format>_<pod_name>_CD-<content_date>_GD-<generated_date/time>.zip
example: e_sym-sup-uat-chat-glb-1_CD-2019-08-07_GD-2019-08-08_1565283570922.zip
The format for the scheduled export file is below:
<export_format>_<pod_name>_SD-<start_date>_ED-<End_date>_GD-<generated_date/time>.zip
example: e_sym-sup-uat-chat-glb-1_SD-2019-08-13-00_ED-2019-08-14-00_GD-2019-08-14_1565741400162.zip
Refer to the Knowledge Article found here on how to perform an ad-hoc content export.