Some files get uploaded on a daily basis to an FTP server and I need those files under Google Cloud Storage. I don\'t want to bug the users that upload the files to install
You could setup a cron and rsync between the FTP server and Google Cloud Storage using gsutil rsync or open source rclone tool.
If you can't run those commands on the FTP server periodically, you could mount the FTP server as a local filesystem or drive (Linux, Windows)