Duplicacy - A new generation cross-platform cloud backup tool
Truck - A faster alternative to FTP
Time Machine - Time Machine is the breakthrough automatic backup that’s built right into Mac OS X.
Synchromat - Synchromat is file and folder synchronization software for Windows.
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
arRsync - arRsync is a tool that is designed for macOS that is used for transferring and synchronizing files between a computer and a storage drive.