Econ Technologies (http://tinyurl.com/jyko5xm) has rolled out ChronoSync 4.7.1 with improved cloud performance. Its a sync, backup, and bootable backup app for the Mac.
ChronoSync can backup and sync to anything you can connect to a Mac: external drives, thumb drives, NAS drives, remote Macs, PCs and cloud services. Version 4.7.1 includes several fixes, and specifically improves direct cloud connections for Amazon S3 and Google Cloud Storage.
ChronoSync works with macOS 10.8 and higher. It costs $49.99; a demo is available for download. Version 4.7.1 is a free update for registered users.