Hi @SiyamandRashid
You can use the "Filter query" option in the "When a file is created" trigger to specify that the trigger should only run when a file is created inside a specific folder.
Use the "When a file is created" trigger as usual.
In the "Folder path" field, specify the main folder's path.
In the "Filter query" field, add the following expression: startswith(folder/path, '<main folder path>')
This expression will filter out any files that are not located in the main folder or its subfolders.