Donors get access to a Donation Edition that contains a few additional features such as an auto-updater, parallel sync, portable version, and silent installation.

[3][4] FreeFileSync works by comparing one or multiple folders on their content, date or file size and subsequently synchronizing the content according to user-defined settings.

In addition to supporting local file systems and network shares, FreeFileSync is able to sync to Google Drive, FTP, FTPS, SFTP and MTP devices.

Earlier versions were packaged with OpenCandy,[5][6] an adware module which many antivirus software vendors classify as malware.

As of July 2024 the then current version 13.7 of FreeFileSync supported the following operating systems and versions:[13] Support for Windows Vista and XP ended with FreeFileSync_v10.11.