About
FreeFileSync is a folder comparison and synchronization application that creates and manages backup copies of your important files. Rather than copying every file each time, it determines the differences between a source and a target folder and transfers only the minimum amount of data needed.
FreeFileSync is open source and available for Windows, macOS, and Linux. The website describes it as aimed at private individuals who use it at home, and notes that since version 13 businesses may also use it commercially through a paid FreeFileSync [Business] Edition.
The website's release notes describe the sync direction options in version 13, including an "Update" variant that uses a database file to distinguish new and deleted files, and multi-file rename support. Version 14.13 is listed as the latest release.
What's new
All release notesHomebrew cask freefilesync 14.13 (sha256 b77ac29c6dd7cfabcb06c9e0232407504401fce9ccd72c25a1883deda5f6a2ab).