FreeFileSync Open Source File Synchronization

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Synchronize Files and Folders

Key features
FreeFileSync is a folder comparison and synchronization software that creates and manages backup copies of all your important files. Instead of copying every file every time, FreeFileSync determines the differences between a source and a target folder and transfers only the minimum amount of data needed. FreeFileSync is Open Source software, available for Windows, macOS, and Linux.
 
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FreeFileSync 10.13
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Latest News

Jun 13, 2019
FreeFileSync 10.13 has been released!
Jan 26, 2019
Synchronize files with Google Drive
Jul 16, 2018
Parallel file copy and ad-free installer
Jun 11, 2017
FreeFileSync Video Tutorials available
May 24, 2017
FreeFileSync adds Support for FTP and FTPS
 
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User Reviews

Awesome. Much more versatile than SyncToy. I love the fine-grained control and also the option to preserve deletions. I use it on a couple of identical external HDDs for off-site backups. Different drive letters? No problem, just copy the XML config file and change the drive letter. Save. Run. Done.
cadbloke
Thanks for a great app. It really gives peace of mind knowing that files are backed up right. Especially when I discovered image programs aren't transferable to another computer. FreeFileSync files are. Yeah!
Dale Dudas
Pleasantly surprised after trying 4 others, as it supports my Unicode filenames, feels lightweight, and makes the options fairly clear.
oid-2658093
FreeFileSync is pretty awesome. It keeps my two laptops and external backup drives in sync. User friendly with self-explanatory buttons. Extremely fast synchronization. Keep up the amazing work in updating this software.
Dr.Janaka Vithanage