Why Data Export Scheduled Job?
Salesforce provides an out-of-the-boxData Exportfeature that allows organizations to back up their data, including attachments.
This feature can be scheduled to run automatically on a monthly basis, fulfilling the requirement.
Why Not Other Options?
A). Schedule a Report: Does not export attachments and is limited to reportable data.
B). Data Loader Command Line: Requires manual setup and scripting, which is unnecessary for this requirement.
D). Create a Schedulable Apex class: Not suitable, as the Data Export tool is more efficient for full data and attachment backup.
References:Data Export Documentation:https://help.salesforce.com/s/articleView?id=sf.
data_export_overview.htm