Since there is no consistent time or naming convention, using a File Drop Automation with %%BASEFILENAME_FROM_FILEDROP%% allows the system to dynamically handle filenames and start the automation when the file is dropped.

Scheduled Automations (Option C) are based on time, not file arrival, which wouldn't be reliable without consistent timing.

—

Exact Extracts from Salesforce Documentation:

Source: Salesforce Help – File Drop Automation

→ "Use File Drop starting source when the automation needs to start whenever a file is dropped into a specific directory, independent of timing."

Source: Salesforce Help – Base Filename Personalization Strings

→ "%%BASEFILENAME_FROM_FILEDROP%% references the filename from the file that triggered the File Drop Automation, allowing flexible file name handling."

—