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FreeFilesync
FreeFileSync is a free and open-source program used for file synchronization. It is available on Windows, Linux and OS X. The project is backed by donations. Donors get a few additional features such as an auto-updater, parallel sync, portable version, and silent installation. It has received positive reviews.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 FTP, FTPS, SFTP and MTP devices.
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