Autoloader will keep an inventory of the files it already loaded and not re-load them, this is the default behavior. You can overwride this behavior by enabling "cloudFiels.allowOverwrites" and autoloader will re-ingest the files based on file modificaiton time. Keep in mind that autoloader cannot detect records already loaded, it will reload the same data twice if you implement the "cloudFiles.allowOverwrites". It is our recommended best practice, when loaded files into cloud storage, to create new files with new names.