To accomplish this task SyncUp serves as a GUI for rsyncx (http://www.macosxlabs.org/rsyncx/rsyncx.html).
What's new in this version:
- complete cocoa rewrite
- improved performance and reliability
- folder presets for mail, safari...
- sources can temporarily be disabled
- support for source files (not only folders)
- status report during backup
- complete error reporting to console.log