Quick Answer

File synchronization software keeps folders matched across drives, devices, or network locations. It is useful for backup preparation, working folders, and repeated file-transfer workflows.

Frequently Asked Questions

What is file synchronization software?

File synchronization software compares two or more folders and copies changes so files stay aligned. Some tools support one-way sync, two-way sync, scheduled sync, and conflict rules.

Is file sync the same as backup?

No. Sync mirrors changes, including mistakes and deletions. Backup should keep historical copies or restore points so you can recover older versions after accidental changes.

What should I check before using a sync tool?

Check whether the tool supports preview mode, conflict handling, deletion protection, scheduling, logs, network paths, and the file systems used by your drives.

Editorial Trust Note

Techmixer refreshed this old synchronization guide to connect it with current backup and automation workflows. Before using any sync tool, test it with sample folders so delete rules and conflict handling are clear.

Last reviewed: 8 September 2026.

2026 Update: Related AI and Software Workflow Guides

This older Techmixer article still receives Google Search impressions for free file synchronization software. We refreshed it with current navigation links so readers can move from legacy Windows and freeware topics into newer AI, automation, and software workflow guides.

• best AI tools for office productivity
• portable USB Hermes AI agent platform
• free VPS options for hosting AI agents

There are a number of free or open source file synchronization software that can be found on the internet. Free file synchronization software lets you back up your files and folders on a device such as a removable disk (USB Flash), external drive or computer. File synchronization is a safety measure that helps to ensure the different files and folder copies are the most current variations. Therefore, for users having more than one computer or a number of different devices, this software comes in handy in securing  data.

Free File Synchronization Software list:

GoodSync

GoodSync is one easy and reliable file backup and file synchronization software. It automatically analyzes, synchronizes and backs up emails, photos, music, contacts, financial documents amongst other things between desktops, laptops, servers, external drives, and Windows Mobile devices, as well as remotely through FTP, SFTP, WebDAV, and more.

FreeFileSync

FreeFileSync compares files in two folders and synchronizes them. It can as well delete files that no longer exist (or move them to the Recycle Bin), create batch jobs for automated synchronization, handle the inclusion or exclusion of specific files, copy locked files (Windows only), handle daylight saving time changes on FAT/FAT32 file systems, ignore Windows’ “\RECYCLER” and “\System Volume Information” folders (Windows only), has conflict detection, etc. Synchronization over the network is supported.

CleanSync (Windows)

CleanSync is able to sync files between two computers or between a computer and a removable (external) device like a thumb (flash) drive. It can automatically resolve changes in drive letters (since removable devices can be plugged in with a different drive letter) and detect conflicts (such as when a file is deleted on one device but has been modified on the other device), allowing you to decide what to do manually. This is an open source program, released under the GNU General Public License.

Microsoft SyncToy (Windows)

Microsoft SyncToy allows you to synchronize your data between two storage locations, so that you can keep the latest version of your files in both locations. The tool is also able to track situations when you rename a file, and it makes sure that the file in the other storage area is also renamed. Other features include the ability to exclude files based on filename matching or file attributes, unattended (scheduled) folder updating, sync of encrypted files, sync over the network, etc. The tool requires the .NET framework.

Unison File Synchronizer (Windows, Mac OS X, Linux)

Unison synchronizes files and directories stored on different hosts on the Internet. It can handle changes made to either replica of a distributed directory structure, and hence is more than just a mirroring utility. It is open source, distributed under the GNU GPL, and works on Windows, Linux, Solaris, OS X, etc

File Synchronization Softwares should be considered as an important component if you are running various computers with incompatible OS’s. There are a wide variety of softwares available online which can help you do so. Why not give it a try?

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