FreeFileSync - file synchronization and backup software

FreeFileSync – free and open source data backup software that helps you synchronize files and folders

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You can compare folders:

Compare by File time and size. This variant considers two files equal when both modification time and file size match;
Compare by File content. Two files are marked as equal if they have identical content;
Compare by File size. Two files are considered equal if they have the same file size;
Symbolic Link Handling. FreeFileSync lets you choose to include symbolic links (also called symlinks or soft links) when scanning directories rather than skipping over them.

FreeFileSync supports additional synchronization scenarios via a command line interface;
It is possible to include or exclude elements using filters;
You can create configuration profiles with the specified settings;
Performance settings FreeFileSync can be set up to issue multiple file accesses in parallel;
Various types of synchronization settings are available: two way synchronization (identify and propagate changes on both sides. Deletions, moves and conflict are detected automatically using a database), mirror (create a mirror backup of the left folder by adapting the right folder to match), update (copy new and updated files to the right folder), custom (configure your own synchronization rules);
Support for batch job scheduling;
FreeFileSync supports synchronization with Google Drive, SFTP and FTP;
RealTimeSync option available;
Keyboard shortcut support.

The software FreeFileSync is available for installation on Linux, Windows and macOS.

Installation method	OS
Flatpak	Ubuntu, Linux Mint, Debian, Arch Linux, Fedora, CentOS, KDE Neon, openSUSE, elementary OS, Manjaro, Red Hat Enterprise Linux
EXE	Windows
PKG	macOS

*Ubuntu (GNOME), Kubuntu (KDE), Xubuntu (XFCE), Lubuntu (LXDE)

Install Software via Flatpak package

flatpak install flathub org.freefilesync.FreeFileSync

Install Software via EXE package on Windows

Install Software via PKG package for macOS

Language Interface:	English, Russian, Deutsch, Spanish, French and others
Description version:	11.3
Developer:	Team FreeFileSync
Programming language:	C++
License:	GPL v3
Software website:	freefilesync.sourceforge.net