FreeFileSync is an Open-Source folder comparison and synchronization tool. It is optimized for highest performance and usability without restricted or overloaded UI interfaces.Features: Compare files (bytewise or by date) and synchronize them. No limitations: An arbitrary number of files can be synchronized. Subfolders are also synchronized, including empty folders. Network support. Lean & easy accessible UI: Highly optimized for speed and huge sets of data. Algorithms coded in C++ completely. Focus on usability: Only necessary functionality on UI: no overloaded menus or icon jungle / Select folders via drag & drop / Last configuration and screen settings are saved automatically / Maintain and load different configurations by drag&drop, load-button or commandline / Double-click to show file in explorer / Copy & paste support to export file-lists / Delete superfluous/temporary files directly on main grid / Right-click context menu / Progress indicators, status information and error reporting / Sort file-lists by name, size or date / Display statistical data: total filesizes, amount of bytes that will be transfered with the current settings. Easy configurable commandline mode for automated synchronization. Support for filesizes > 4 GB. Option to move files to Recycle Bin instead of deleting/overwriting them. Automatically ignore directories "RECYCLER" and "System Volume Information" when comparing and syncing. Localized German version available. Delete before copy: Avoid disc space shortages with large sync-operations. Based on wxWidgets framework => Portable to many operating systems. Filter functionality to include/exclude files from synchronization (without re-compare!). Include/exclude specific files from synchronization manually. Create sync jobs via GUI to synchronize automatically (can be scheduled or executed directly).