Synchronize Files and Folders synchronize files, synchronize folders

FreeFileSync is a free Open Source software that helps you synchronize files and synchronize folders for Windows, Linux and Mac OS X. It is designed to save your time setting up and running backup jobs while having nice visual feedback along the way.
Key features See the list of key features!


Support the Project

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 to support the project by donating.
Your donation will support the development of new features and help to keep up continuous program maintenance. This ensures that FreeFileSync quickly adapts and always provides for the best performance in an ever-changing hard- and software landscape.


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User Reviews

Thumbs upPeri reviewed FreeFileSync: Thumbs up

Awesome and reliable sync software you can count on. I've been using it for more than 3 years now. Best I have used so far for syncing.

Thumbs upSundesh reviewed FreeFileSync: Thumbs up

Works like a charm to sync my laptop with my external disk and my home NAS. I will not use anything else!

Thumbs upinfinum reviewed FreeFileSync: Thumbs up

Absolute best. I wish I could point to some issues but I can not think of any major flaws. One minor is that there is no ability to choose the installation language and so it forces an auto-detected language but that is all. Great app.

Thumbs upColin reviewed FreeFileSync: Thumbs up

Kudos to the developers. Just works 100% of the time. Long-time fan and appreciative user.

Thumbs upStratos reviewed FreeFileSync: Thumbs up

Just perfect for syncing local and/or network drives. Best free tool I have ever found. I run it on Debian (how about packaging it in .deb?) and in windows portable versions. Congrats to the team and thank you.

Thumbs upPe Klak reviewed FreeFileSync: Thumbs up

Works perfect on Mac!!! :-)

Thumbs uptiti74 reviewed FreeFileSync: Thumbs up

Just the tool I dreamed of! Thanks for offering it for free!

Thumbs updcamarena reviewed FreeFileSync: Thumbs up

Operation is intuitive and simple while powerful features like mirroring, backup, synchronization, etc. can be done manually and automatically. I've been searching for such a tool for a long time and tried several others. Up to now nothing is comparable to FFS.

Thumbs upGK reviewed FreeFileSync: Thumbs up

Best tool for folder synchronization. Thank you for your work.

Thumbs upAnonymous reviewed FreeFileSync: Thumbs up

I've been using FFS for more than one year now and I just love it. It makes my life easier when I need to backup my files. There are several syncing options you can choose, great friendly layout. Simply the best!

Thumbs upMIKE reviewed FreeFileSync: Thumbs up

Love this product. I use it to keep a backup list of all my files. Quick, easy to use, with some fantastic features. If you need to keep folders synced, this is the product to use.

Thumbs upNico Gotin reviewed FreeFileSync: Thumbs up

Excellent program! Very intuitive and streamlined operation. Has all the file synchronization features I need and then some.

Thumbs upmartin reviewed FreeFileSync: Thumbs up

Works like a charm. Easy to use. I can't live without it.

Thumbs upRayborn reviewed FreeFileSync: Thumbs up

One of the greatest little housekeeping gadgets around. Great work, thank you!

Thumbs upMatthew T reviewed FreeFileSync: Thumbs up

Really solid utility. Fantastic features, easy to use, fast and reliable. From a former user of SyncToy.

Thumbs upTiago reviewed FreeFileSync: Thumbs up

Simply the best synchronization program. Already use it for more than 3 years and never had any problems. Congratulations to the developers!

Thumbs upallijeanbean reviewed FreeFileSync: Thumbs up

I have found the sorcerer's stone and it is FreeFileSync.

Thumbs uppatricknbowman reviewed FreeFileSync: Thumbs up

Excellent product! Backing up my digital photo collection is trivial, even as I move folders around, change photo ratings, etc.

Thumbs upSpaz reviewed FreeFileSync: Thumbs up

Great application. A must-use for any file management solution, super rich and easy to use.

Thumbs upMark reviewed FreeFileSync: Thumbs up

Moved from SyncToy to FFS - much better, faster, less problems. Thank you.

Thumbs uprodob reviewed FreeFileSync: Thumbs up

Best of all!!! No doubt, forget Synctoy. Now 5 years using it on Windows without trouble.

Thumbs upjonafc reviewed FreeFileSync: Thumbs up

Used to use MS synctoy but it's so out of date you can see there is no future in it. Looks like sync center is the way to go for MS native but I have Windows 7 Home so I don't have that choice.

Anyway, came across this, judged it on downloads per week and gave it a go. Really impressed, easy to setup and with just a little reading you can get it to do realtime sync with RealtimeSync that comes with it!

Looks like it's maintained well and kept up to date (big plus) and I like the way it can use Windows Shadow Copy for locked files. Great stuff and thanks!

Thumbs upAnonymous reviewed FreeFileSync: Thumbs up

Great for differential backup using synchronization. :)

Thumbs upPaari reviewed FreeFileSync: Thumbs up

I tried many backup software before FreeFileSync. Let me tell you, this is the most user friendly backup software I have seen. I have been using this for the past 2 years and found it very useful.

Thumbs upjslopezg reviewed FreeFileSync: Thumbs up

Excellent and portable. It's my favorite solution to sync my devices and make backups. Useful options and intuitve interface. I just have created this account to say thanks to the author.

Thumbs upKero reviewed FreeFileSync: Thumbs up

The best!

Thumbs upeahm reviewed FreeFileSync: Thumbs up

One of the best, if not THE best. Very powerful and fully customizable through scripts. Thanks for creating it and making it free and open source.

Thumbs upErin R. reviewed FreeFileSync: Thumbs up

Excellent synchronization software! It has an intuitive interface, and copies reliably. It quickly gives you an accurate idea of potential conflicts before you start a copy job, and it does a good job visualizing the progress of the job as it progresses.

Thumbs upRoland reviewed FreeFileSync: Thumbs up

Full stars. I've been working with it for years already. Makes backups very easy and perfectly. Even works over networks. Very good, very reliable.

Thumbs upkarnonlm reviewed FreeFileSync: Thumbs up

The most powerful file synchorization tools I have ever seen. Use it everyday!!

Thumbs upUmberto reviewed FreeFileSync: Thumbs up

I've been using FreeFileSync for two years and it is great. I donated through PayPal :-)

Thumbs upMahinder Nath reviewed FreeFileSync: Thumbs up

I have been using FreeFileSync for the last one year and have been a very happy user. It is easy to install and very easy to configure and use. I would recommend FreeFileSync usage.

Thumbs upAntoine reviewed FreeFileSync: Thumbs up

The best free synchronizer I know. Even a small effort to facilitate the selection of directories and it will be perfect. Thank you very much to all the team for this software that I use every day!

Thumbs upnw0001 reviewed FreeFileSync: Thumbs up

The most amazing and useful piece of software I have. Particularly the versioning feature, which allows me to perform my backups with file history in a more useful manner than general backup software. It works well and is well designed.

Thumbs upHiuahiuahiuA reviewed FreeFileSync: Thumbs up

Better than SyncToy. It's my favorite now!

Thumbs upHervé Guillain reviewed FreeFileSync: Thumbs up

I use FreeFileSync for months and I am very happy with this software. Thank you and congratulations to those who developed it, improve it and update it regularly.

Thumbs upbunnybat reviewed FreeFileSync: Thumbs up

A wonderful tool! Peerless! Tons of thanks to its maker...

Thumbs upLink Liu reviewed FreeFileSync: Thumbs up

Excellent software! I love it!

Thumbs upPatrick B reviewed FreeFileSync: Thumbs up

A good sync tool needs reliability, batch capability, a compare-only mode, and configurable rules for dealing with different out-of-sync cases. FreeFileSync has all of those and a straightforward user interface as well. I really can't think what I would add. Congratulations to the development team!

Thumbs upEdo Hulsebos reviewed FreeFileSync: Thumbs up

Exactly what I was looking for! Nice program, easy to use interface, works like a breeze!

Thumbs upDG reviewed FreeFileSync: Thumbs up

Favourite tool I have used. Thanks so much. Makes keeping my USB stick and google drive in perfect sync.

Thumbs upaltex reviewed FreeFileSync: Thumbs up

Really replaces rsync for windows.

Thumbs upLeonardo Dias reviewed FreeFileSync: Thumbs up

It works very well. I sync a whole folder located on my note, including a local *.pst from outlook to flash drive.

Thumbs upAuke reviewed FreeFileSync: Thumbs up

Works beautifully in multi-platform (Ubuntu Linux, Windows, Mac) environments.

Thumbs upErin R. reviewed FreeFileSync: Thumbs up

Great program! Easy to use, transparent, and does a great job syncing files.

Thumbs upHappy User reviewed FreeFileSync: Thumbs up

This is a great software for free. It works so good and it comes with no junk.

Thumbs upBob in New Hampshire reviewed FreeFileSync: Thumbs up

I have used a bunch of backup software, some paid and some free. But, Free File Sync is the simplest most straightforward way to back up files. All I did was copy the pertinent directories to a 1.5 TB USB connected drive, then set up a batch file in FFS to run every day at noon and sync the two directories. Like magic it works flawlessly. And, rather than go through some clunky interface to restore something it is a simple as going to the external drive and copying the files back.

Thumbs upseannn reviewed FreeFileSync: Thumbs up

I created an account just to post my praise to the author. Class A material. DFS Replication with Windows Server was proving to be a nightmare. Deleting files without reason, failing to replicate in both directions, erroring out, just becoming an overall headache.

This solution was not only intuitive to use, easy to integrate, and easy to confirm functionality (The log files are heaven sent - They are concise and to the point yet in depth and serve a purpose), but is extremely powerful with the configurable batch jobs. Kudos to the author, and thank you for providing such an awesome product. :)

Thumbs upAdrian Toth reviewed FreeFileSync: Thumbs up

Excellent! Fast, easy-to-use, multi-platform and free: the best file sync tool, that I have ever used.

Thumbs upjmj288 reviewed FreeFileSync: Thumbs up

Kick ass on both Linux and Windows: definitely a top-100 open source project! Much appreciation to the developer for this great app! :)

Thumbs upnicolaes reviewed FreeFileSync: Thumbs up

Best tool I've used for keeping in sync between home, office and abroad. Thanks!!!

Thumbs upM. Del Gatto reviewed FreeFileSync: Thumbs up

I've tried many different programs for file synchronization. I stopped when I started using FreeFileSync. Thank you for developing such a superb and super-useful program. I am recommending it whenever I have a chance. Keep up the already-very-good work. Cheers.

Thumbs upChris Bosch reviewed FreeFileSync: Thumbs up

I have been searching (for a long time up to about 2 years ago when I found FreeFileSync) for a utility that does this, even contemplated creating my own. FreeFileSync is a one stop solution that does it all, and does it the way I expect it to. And its versatile and user friendly enough to compare files produced by the engineering tools I use. I've even used it to check disk transfer speed in real life scenarios, works like an absolute charm.
It really became a tool I use extremely often, it's one of my must have's like 7zip. It beats "Unison" hands down for user friendliness and speed to install and get on systems. It beats the tool "Beyond Compare" hands down because it's open source and freely available, but I have to say, I'd love the "Beyond Compare" capabilities, but I cannot justify its cost. FFS does enough for me that I can do without it.

Thumbs upCaspar Schutte reviewed FreeFileSync: Thumbs up

I've been using this utility for more than a year now and still recommend it!

Thumbs upblues12 reviewed FreeFileSync: Thumbs up

Lots of really useful small details: The right mouse click on gear icons and grid rows, the quick selection change via overview window and space bar, copy and paste of filters and much more.

Thumbs upthe-nightowl reviewed FreeFileSync: Thumbs up

Maybe the best synchronisation program you can get: it's fast and intuitive, relatively easy to learn, and, most important, very reliable.

Thumbs upKris N reviewed FreeFileSync: Thumbs up

By far the best and most flexible file sync software I have come across. Allows for customization. The only software I know that allows you to only sync files that exist already in both source and destination folders. This feature comes in handy to do versioning.

Thumbs uplechuan reviewed FreeFileSync: Thumbs up

After wasting $40+ dollars on a competitor's product, I tried out freefilesync. FreefileSync was able to compare hundreds of thousands of files (NAS->NAS) in 10 minutes, which was taking the competitor's product over 3 hours. I ended up deleting the competitor's product and relying on FreeFileSync. Awesome, awesome backup program.

Thumbs up،ثثس reviewed FreeFileSync: Thumbs up

For the longest time I was looking for a simple straightforward synchronization program to make weekly backups. Finally I found it. Thank you guys for making this sublime program available for free.

Thumbs upSimon reviewed FreeFileSync: Thumbs up

Excellent sync software; replaced SyncToy with this when I realised that SyncToy had gradually wiped rather than backed up my files. Works well; can't believe how much quicker it is!

Thumbs upVendeeClown reviewed FreeFileSync: Thumbs up

Since I am a backup paranoiac because I have lost data several times, I want something that is quick and painless. This is super easy to use. It also, since it does not give me an error message, copies all the files that a windows copy and paste would not copy because the file names are too long or they are organized in too many sub-folders (what a hassle that is, but that is another windows problem). Have I confirmed this by testing and verify copying? No. It is easy enough to do, but I am way too busy.
Just like people believe in their country and a God, I believe in FreeFileSync. The best part is that you are not spammed with advert pop ups or anything like with other freeware. Thank you so much FreeFileSync!

Thumbs upiamvii reviewed FreeFileSync: Thumbs up

What an excellent piece of software. Initially deployed as an experiment, has turned into a staple in my toolbox. I have it set up for an hourly mirror sync via Task Scheduler and it has proven itself time and time again. Nearly three million files synced, hourly revisions are kept on another drive and then compressed monthly... this is one beautiful piece of software. Thank you so much.

Thumbs upmcfex reviewed FreeFileSync: Thumbs up

Thank you for this awesome sync software. I tried a lot - free as well as pricey alternatives, but when I finally found this I knew my search had come to an end :)! It has an easy and intuitive UI and all the features you would want from a sync tool! Funny how free stuff beats the commercial versions again and again...

Thumbs upmutancik reviewed FreeFileSync: Thumbs up

It is the ideal application to synchronize my files between two computers and one file server. I was testing before a few other solutions, but FreeFileSync is the best of the best!! Thank you for this project! Best regards.

Thumbs upabeali reviewed FreeFileSync: Thumbs up

Excellent utility for synchronizing two hard drives and/or important directories! Easy to use and fairly intuitive. Short learning curve. For the reviewer looking for "Help" resources, it is right there on the top left of the screen next to the Tools tab. Program is fairly documented in the "Content" selection.

Thumbs upmradeveci reviewed FreeFileSync: Thumbs up

Great FREE sync software that actually replaced my 'paid' for app. Keep up the great work, thank you! :)

Thumbs upspace0ctopus reviewed FreeFileSync: Thumbs up

SO awesome. There's so much I could say about this indispensable program, but I'll just tell you now that the amount of options and different types of sync methods will ensure you are able to do what you need, as well as the ability to save your sync configurations for certain sync jobs, so that you can easily do them in the future.

Great UI, please don't change it, because too many people are ruining their software these days with some new crap that renders their software useless, literally making it impossible to do anything. Keep up the GREAT work, developers, you really know what you're doing <3 You rock mah socks! ^_^

Thumbs upgeek-man reviewed FreeFileSync: Thumbs up

Was using Unison, but there weren't many updates and it doesn't support x64. FreeFileSync is very simple to use! Also it is much faster than Unison! I recommend it!

Thumbs upestogram reviewed FreeFileSync: Thumbs up

Very intuitive, and because of its flexibility it's possible to have portable backups since it can backup to a relative file path. Then you won't need to change destination path when you move the backup folder.

Thumbs upzenphic reviewed FreeFileSync: Thumbs up

Fast, easy and reliable. A great tool to keep two (or more) folders synchronized (even when changes have been done on both sides since the last synchronization). Excluding certain files or folders from synchronizing is quick and painless.

The application will warn you when too much has changed in the folder contents since the last sync. It supports batch jobs. I personally use this software to backup my personal files onto an external hard drive. It works great through my home network too. Without a doubt, I prefer FreeFileSync over Synctoy and SyncBack. Thank goodness for FreeFileSync!

Thumbs upodj1964 reviewed FreeFileSync: Thumbs up

After death of my home's NAS I was in big troubles... But now, thanks to FreeFileSync, I have all my data saved in a so easy way that I am not searching another NAS. A couple of external cheap hard disks are enough!! (and FreeFileSync, of course) :-) I am sharing my experience through my international contacts. Hoping to find more supporters for your GREAT work. Thanks for all.

Thumbs uprogerturner2 reviewed FreeFileSync: Thumbs up

This is a brilliant piece of software. It is simple to set up and easy to use. I have been using it for a few months now and it has never crashed. I use it to sync to my Dropbox via BoxCryptor encryption. I don't completely trust auto syncing software, so this is a great alternative. It allows you to keep your original files on your computer, and also save separate back up files on your external drive or Dropbox etc. Well done guys!

Thumbs updtshudy reviewed FreeFileSync: Thumbs up

This tool is a really nice application. I've tried countless sync tools, both free and paid. This is the one I've chosen to use. It works great in both Windows and Linux. Many many thanks to the developer(s). I know how much time and energy it takes to code and maintain something like this. I appreciate it. Keep up the great work.

Thumbs updeibiddo reviewed FreeFileSync: Thumbs up

Excellent Program. A HUGE improvement over Sync Toy that I've been using for years. Anyone who wants to sync or backup should download and use this program. Many thanks to the developers

Thumbs upoid-3857101 reviewed FreeFileSync: Thumbs up

This program is excellent. I have been using it between 2 computers for 3 weeks and no issues. I was using SyncToy for a few years with few problems, but recently SyncToy began to delete the newer files, some of which I spent hours writing. Thankfully I found FreeFileSync and it is working perfectly.

Thumbs uppiterdias reviewed FreeFileSync: Thumbs up

It is very easy and works over network, local drives and external ones. A must-have if you use more than a computer and huge files make cloud drives an unfeasible option.

Thumbs upoid-3813974 reviewed FreeFileSync: Thumbs up

I wanted to synchronise a Windows 7 64-bit Notebook, an iMac (Lion) with Samba enabled. I have a lot of data to synchronise, about 150 GB and 200,000 files. I've tried SyncToy from Microsoft, Windows 7 built-in synchronisation center, AlwaySync, Syncback, SkyDrive, and so on... Each of those tools took VERY long in the good case, or hanged in the bad case :-( And I tried FreeFileSync: It does exactly that I wanted to do, and it is really very fast. It scans my 200,000 files in only 2.5 minutes!!! So I'm VERY happy with FreeFileSync.

Thumbs upmechtengineer reviewed FreeFileSync: Thumbs up

I have tried two other free synchronisation software suites: Synkron (also SourceForge software) and RichCopy (from Microsoft). FreeFileSync is better than both of them for a number of reasons:

1. Intuitive user interface: I setup a multiple folder synchronisation within minutes! The buttons are clear, and if you aren't exactly sure of their function, hovering the mouse over the buttons will reveal clarifying information.

2. Informative: I knew exactly what files were being deleted or updated. The initial "compare" function is MUCH clearer and easier to use than Synkron's "analysis" function. Synkron would give no information about the analysis while it was occurring, so you don't know what progress it is making. FreeFileSync lets you know how the comparison is going, and gives a very handy graph to show progress, including file transfer rates, etc...

3. Stable: I have not yet had FreeFileSync crash on me. RichCopy and Synkron have both crashed, and Synkron tends to freeze the system.

4. Efficient: Synkron writes the synchronisation files to a backup file for some reason which I could not disable in the settings. This both slows the system down, but also uses up a significant amount of hard drive memory over time, since these files are not deleted. Quite simply the best free synchronisation software I have ever used!

Thumbs upmagickz reviewed FreeFileSync: Thumbs up

Very cool. Now it helps me to keep folders in sync and backup files from internal and external hard discs, mp3 player and my phone... :-) Many thanks to the developers.

Thumbs upexecuterror reviewed FreeFileSync: Thumbs up

Best out of all 5 sync programs I've tried, both commercial (Goodsync, AllwaySync) and non-commercial (SyncBack, SyncToy). Don't waste your time trying other "commercial" ones. THIS IS THE BEST.

Thumbs upadimare reviewed FreeFileSync: Thumbs up

This is one of those tools you cannot live without. I use FreeFileSync at least twice a day, to update the full backup I keep in a USB stick. Every month I also mirror my work files into a removable USB-2 drive. Once I waited for 3 months to update into my second removable drive and I had to wait for only 25 minutes, even though I had changed a lot of songs and videos. Moreover, my USB stick backups take no more than 3 minutes for a full day of work.
The creator of FreeFileSync was kind enough to respond to some suggestions I made, but it's hard to think on improving this program because it is already great!

Thumbs uposkar101 reviewed FreeFileSync: Thumbs up

Really love this program and have been using it under Windows a lot. Now have an iMac and was really missing this program, so I am very happy to see that there is now also a MAC version. Thank you very much.

Thumbs upfarcodev reviewed FreeFileSync: Thumbs up

Faster than commercial alternatives. Perfect to make backup and update SVN repositories.

Thumbs upjashale reviewed FreeFileSync: Thumbs up

This is a really well done piece of software. The GUI is intuitive. It is fast. The file transfers are fast. I am really impressed with this tool.

Thumbs upandycivil reviewed FreeFileSync: Thumbs up

I love the simplicity of this. Other programs compress and bundle which is unnecessary and obfuscating. This program is actually easier and simpler than copying folders by hand, because once you've set up your paths and saved them in profiles, you just choose the profile. If you put a little effort in at the beginning working out what needs to be backed up, then the existence of the profile in the list reminds you that you need to do a backup of it.

Thumbs upcoogrrr reviewed FreeFileSync: Thumbs up

I am a 20yr IT vet (really!) I do minor programming and I have had the need for a feature rich program that will get the files from A to B without issue and save security information. FFS is simply the best in the market hands down. The fact that it is free totally blows me away!

Since my initial review we have come to use this product in our daily processing. The fact that the developer truly listens and incorporates good effective additions as well as continuing to improve the product puts him ahead of even larger software houses. Please keep up the good work and look for our donation! James Lee Outsource Technologies Inc.

Thumbs upoid-3474008 reviewed FreeFileSync: Thumbs up

I have used a lot of sync tools. I am sure FreeFileSync is one of the best tools available in the market out there. Above all it is free!! Thanks a lot to the dev team for contributing such a wonderful product.

Thumbs upweathercontrol reviewed FreeFileSync: Thumbs up

After successful tests, i permanently installed the program with 6 TB of data exchanged between 2 x 3 harddisks (12 TB total) and it since works reliable and fast. It's even better than the best commercially available software, so there goes a big THANK YOU to the fantastic programmers and the GNU open source community & last but not least to sourceforge!!

Thumbs upwabassoap reviewed FreeFileSync: Thumbs up

The best file backup and sync software I have used for far. It's quick and easy to use. Please keep this software portable as that is one of its greatest assets. I use it to synchronize between multiple computers, drives, and operating systems seamlessly. Having a dual OS has never been easier. Thank you!

Thumbs uprgadawg reviewed FreeFileSync: Thumbs up

I've been looking for a tool like this for about 3 years, when my most favorite directory sync tool stopped development, short of Windows XP. GREAT work on this. Clean, efficient, simple dir comparison or sync. Run it and it shows you what's out of sync, without all of the complicated configurations, etc. that other dir sync tools have. Thanks.

Thumbs upMajorG reviewed FreeFileSync: Thumbs up

Simply the best file sync software and also free backup software: No feature bloat, no bugs, does what it's supposed to blazingly FAST!

Thumbs upsrjones67 reviewed FreeFileSync: Thumbs up

A GREAT piece of software that rivals other expensive software. Very versatile and always expanding. The developer is very helpful and responsive. Couldn't live without FreeFileSync!

Thumbs uppellk reviewed FreeFileSync: Thumbs up

I've tried almost every files and folders synchronisation program available on windows. And FreeFileSync is definitely the best. It's the fastest, the most customisable and the most intuitive one, and above all, it's open source.

Thumbs upoid-2658093 reviewed FreeFileSync: Thumbs up

Pleasantly surprised after trying 4 others, as it supports my Unicode filenames, feels lightweight, and makes the options fairly clear.

Thumbs upoid-2864505 reviewed FreeFileSync: Thumbs up

Flexible. Does what it's supposed to do well. I switched from SyncBack (free version) to FreeFileSync because it handles a few important things better, e.g. copying locked files, more powerful filters.

Thumbs updoru001 reviewed FreeFileSync: Thumbs up

Saved my life. Now it takes me 30 sec instead of 45 min to update my 8000 files / 4 GB on LAN. I learned it in 30 sec. Simple and reliable.

Thumbs upTheo reviewed FreeFileSync: Thumbs up

Awesome scalable tool!!!!! This is the only tool I know which can compare and sync 2 directories with more than 11,000,000 files, and not die while syncing. It took my server a couple of days to sync those monster directories, but hey ... I'm happy! - Theo Ekelmans Ordina Datacentre services.

Thumbs upanonymous reviewed FreeFileSync: Thumbs up

This is ***THE BEST*** It managed all of my 80,000 files in 489 directories: No problem!! I have tried at least 10 different sync tools in the past 10 years. This is wonderful. It is a 'good looking' friend of rsync!

Thumbs uptsreyb reviewed FreeFileSync: Thumbs up

Wow! FreeFileSync is the best backup tool I've ever used! I've bounced back and forth between many tools over the years, and this one is so much simpler (without sacrificing functionality) in so many ways. The backup process is quick and reliable.

Thumbs upkissaki reviewed FreeFileSync: Thumbs up

Great application for all your file/folder comparison and synchronisation needs. Allows you to add multiple, specific source and target folders and use filters to exclude and include specific files and/or sub-paths.

The generation of a batch script allows you to automate the synchronisation, which you set up in the GUI. It can then run regularly and in the background.

The synchronisation dialogue is beautiful, showing you the speed at which it happens. Display filters allow you to grasp the changes, and preview stats allow you to see the quantity of changes before-hand (so you don't make a mistake, moving the wrong way around for example).

Thumbs upakya reviewed FreeFileSync: Thumbs up

Probably the best open source software that I have ever encountered. :) Keep up the good work!

Thumbs upisastronomer reviewed FreeFileSync: Thumbs up

This app is great! Easy, intuitive backup and synchronisation between different folders or devices. And it gets better: It is cross platform, so I can use in Win, Linux or Mac! Thanks for the development and maintenance of this app! Keep up the good job!

Thumbs upjeffplemons reviewed FreeFileSync: Thumbs up

What a simple yet incredibly helpful and powerful program! The user interface is flexible enough to house lots of things or to be very simple and sleek - and it performs binary comparisons! Cheers for a job well done!

Thumbs upgodlymusic reviewed FreeFileSync: Thumbs up

Excellent, efficient tool for manual backup and folder mirroring. No persistent services. Does what it promises and is updated frequently. Takes advantage of multicore now. A big thanks to the developers.

Thumbs upSam Gerber reviewed FreeFileSync: Thumbs up

I've used Microsoft's SyncToy for years and thought it was the best of what was available ... that is, until I started using FreeFileSync. There's no comparison in terms of all the things that are important: ease of use, performance, flexibility.

Thumbs upOpenID User reviewed FreeFileSync: Thumbs up

I've been using this tool for a while now and it's simply awesome. Former SyncToy user. Best way to keep a Dropbox style of sync with my external drives. I also dig the new look. Very stylish.

Thumbs upJohnB in Atlanta reviewed FreeFileSync: Thumbs up

This is the best file synchronization program that I've found. It is fast, stable, and has the right features without being bloated.
The author has done a lot of careful thinking about how the program should work from the user's perspective, and (more importantly) how it works under the covers.

Thumbs upliran1 reviewed FreeFileSync: Thumbs up

From my experience until now, it is a great and simple backup software. Great performance, analysis, scan, progress bar and graph, great comparison, flexible so you can configure multiple folders and multiple actions. Nice UI. Does the job as it should.

Thumbs uprobbo7877 reviewed FreeFileSync: Thumbs up

Incredibly useful, manages long path names better than anything else we tried including Ro

Thumbs upjoqqy reviewed FreeFileSync: Thumbs up

Best file sync software I have ever used. I used to run SyncToy 64-bit version, but after running into problems and being unable to fix them (as my file count went up) I decided to try FreeFileSync. To this date, I have not experienced a single problem, not even a hickup. One directory contains over 10 million files, and it runs through with ease.

Thumbs upcadbloke reviewed FreeFileSync: Thumbs up

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.

Thumbs upChristian Vogel reviewed FreeFileSync: Thumbs up

With around 2 million files to compare/mirror, a lot of other tools run into problems with memory, long paths or performance (especially 32-bit tools, when the memory needed to represent the internal file lists exceeds the 2GB process memory limit).

FreeFileSync not only uses a lot less memory for large numbers of files but also provides a native 64bit build, eliminating any possible memory problems with large numbers of files (unless you run out of physical memory).

It also supports long paths, does the file listing in multiple threads (one thread per drive AFAIK) and has just the right amount of configuration options needed to achieve everything without bloating the UI with too many options.

Just started using it today, but I'm really impressed already.

Thumbs updarwin m. reviewed FreeFileSync: Thumbs up

OMG!! This is the GREATEST file synchronization tool I've used. I'm an Ubuntu user/admin for 3 years now and after testing FreeFileSync, I'll stick to it. I think FreeFileSync deserves to be in Canonical's repositories.

Thumbs upchinnboy m. reviewed FreeFileSync: Thumbs up

I got a similar app from PC Magazine a few years ago. I never really figured out how to use it. I tried to start it up and it would not load for reasons unknown. I googled just in case I might stumble across... THIS! It did precisely what I wanted to do. I figured out how to operate it pretty darned quick, which is a testament as I'm gettin' old and am not as fast on the uptake as I once was.

Thumbs uplawrencedol reviewed FreeFileSync: Thumbs up

FFS is highly capable and very fast. More importantly, it's very reliable: I synchronize about 250K files daily, with typically a few thousand changed and about a 500 MB in size and it has yet to mess up.

I used to use MS's SyncToy, but that name actually characterizes it all: a "toy". SyncToy would frequently get confused and want to move things in the wrong direction or show conflicts which weren't the case (esp. with MS network share drives).

One of FFS's strengths is how well it handles conflicts, though I have occasionally wished it had a one-click-for-the-newest button, it's really easy to select a group of files and right-click to send them left or right.

Also, FFS is orders of magnitude faster than MSST for high-latency drives, like WAN drives; synchronizations that would take several hours with MSST 2.1 completed in less than 20 minutes using FFS (and that was quite some versions of FSS ago).

The UI is adequate, with some very minor shortcomings, like not being able to reorder the list of directories being synchronized. Overall it's pretty easy to use, though I think filters and the two settings dialogs could be merged into a single concept / dialog. The ability to hook in an external compare tool is excellent, and it works very well with WinMerge to check exactly what is different between particular files.

Thumbs upmarvindl reviewed FreeFileSync: Thumbs up

The best of the best...