Dec 2, 2025 · FreeFileSync is a free open source data backup software to compare and synchronize files and folders on Windows, macOS, and Linux.

FreeFileSync strives to provide high-quality software with zero open bugs. This is achieved by fast release cycles and free 24/7 support for everyone. If you find FreeFileSync useful, please consider …

Now years after its initial conception, I'm proud to say FreeFileSync has not compromised on its ideals in software design. There is no legacy of historical features that could impede future software …

Basic Usage: Select left and right folders. Compare them. Choose synchronization settings. Click Synchronize to start the synchronization process.

Compact parent path display for medium/large row sizes Fixed crash when mouse inputs are queued due to system lag Don't steal focus from other app when sync progress dialog is shown Fix crackling …

Mirror Synchronization Watch video on YouTube Error 153 Video player configuration error

To resolve this problem you first need to identify which software is responsible for the file changes by using a tool like Process Monitor. Then see if the software has options to disable the unwanted …

FreeFileSyncOpen Source File Synchronization AboutTutorialsScreenshotsVisionDownloadArchiveForumF.A.Q.ManualDonateThanks, About …

RealTimeSync will extract relevant directories for synchronization and set up the command line to execute the .ffs_batch file when changes are detected. Now press Start to begin monitoring.

FreeFileSync is able to detect moved files and apply the same move efficiently on the target side during synchronization instead of a slow copy and delete. To make this work, Use database file to detect …