FreeFileSync for PC: How to Download and Install on Windows (2026 Guide)

Your photos live on the laptop, copies of half of them sit on an external drive, and the newest ones are only on your phone’s backup folder. Which copies are current? Which files exist in only one place — one disk failure away from gone? Copying folders by hand never answers those questions reliably.

This guide shows you how to download FreeFileSync for PC from its official website, install it on Windows 11 or 10, and run your first folder synchronisation. Features, requirements, and first-use steps are covered below, with an honest note about its free version and the optional Donation Edition.

What Is FreeFileSync?

FreeFileSync is a free, open-source folder comparison and synchronisation tool. You point it at two folders — say, your Documents folder and its backup on an external drive — and it compares them file by file, showing exactly what differs before anything is copied, moved or deleted.

You then choose how to reconcile them: mirror one folder to the other for a true backup, update in one direction, or sync both ways so new files on either side end up in both. Saved configurations turn a careful first setup into a one-click routine, and its companion tool, RealTimeSync, can watch folders and sync automatically whenever files change.

Key Features of FreeFileSync

Folder comparison: Compares by file content, size or timestamp, and shows every difference in a clear side-by-side list before you sync.
Flexible sync modes: Mirror, update and two-way synchronisation, with custom rules for how each kind of difference is handled.
Batch jobs: Save a configuration and rerun it with one click — or schedule it — so regular backups take seconds to start.
RealTimeSync companion: Watches folders for changes and triggers synchronisation automatically whenever you edit a file.
Versioning option: Keep replaced and deleted files in a separate location or the recycle bin, so a sync never destroys your only copy.
Network and device support: Syncs with network shares, external drives and phones or cameras connected over MTP.
Free and open source: The full comparison and sync engine is free, with no file-count or folder-size limits.

System Requirements

Operating System: Windows 11 or Windows 10 (64-bit or 32-bit)
Processor: Any modern Intel or AMD CPU
RAM: 4 GB or more recommended when comparing very large folders
Storage: Around 50 MB for the program, plus space for any versioning archive you enable
Display: 1280×720 resolution or higher
Internet: Only for the download and optional update checks
Account: None; the Donation Edition is delivered by email if you choose to donate

How to Download FreeFileSync (Official Method)

As with any backup tool, the download source matters: a tampered copy of the program that manages your only copies of files is a risk you do not need. Unofficial portals bundle old builds with extra installers. Download FreeFileSync only from its official website, where the current genuine release is published.

Official Website: Download FreeFileSync from the official website

Step-by-Step Installation

Open the official FreeFileSync download page linked above.
Click the Windows download button to get the installer, FreeFileSync_Windows_Setup.exe.
Save the file to your Downloads folder.
Double-click the installer and approve the Windows permission prompt.
Follow the setup screens and keep the default installation folder.
Click Install, then Finish when setup completes.
Launch FreeFileSync from the Start menu — the main window opens with its two folder panels.

First-launch note: On your first run, resist syncing immediately. Press the Compare button first and study the difference list — understanding what FreeFileSync proposes to do is the habit that keeps backups safe.

How to Run Your First Folder Sync with FreeFileSync

In the left panel, browse to your source folder — the one holding the files you work on.
In the right panel, browse to the destination folder — for example, the backup folder on your external drive.
Click the green Compare button and review the list of differences it finds.
Click the gear icon and choose your sync method — “Mirror” for a one-way backup, or “Two way” if both sides change.
Check the preview of actions, especially any files marked for deletion, before you continue.
Click Synchronize, confirm, and let it finish — then save the configuration for next time with File → Save As.

FreeFileSync Free vs Donation Edition: What Is the Difference?

Here is the honest picture. FreeFileSync’s standard version is genuinely free and open source — not a trial — and it includes the complete comparison and synchronisation engine with no limits on files, folders or size. For most people, it is all they will ever need.

Alongside it, the developer offers a Donation Edition: donate any amount you choose and you receive a personal edition with convenient extras, such as an automatic updater, portable zip distribution, parallel file copying and silent installation options. It is a way to support development and save a little time — the core syncing power is identical in both. Be wary of any other site selling a “pro” version; the Donation Edition is only offered through the official website.

Frequently Asked Questions

Is FreeFileSync safe to download and use?
Yes, from the official website linked above. FreeFileSync is a long-running open-source project, and it always shows you a preview of changes before applying them. As with any sync tool, review the deletion column before confirming — that habit, plus the versioning option, keeps your files safe.

Is FreeFileSync free?
Yes. The standard version is free and open source, with the full sync engine and no limits. The optional Donation Edition adds convenience extras like an auto-updater in return for a donation of your chosen amount — it is not required to sync your folders.

Can FreeFileSync back up to an external drive or network folder?
Yes. It works with local folders, external USB drives, network shares and mapped drives, and it can also sync with phones and cameras connected over MTP.

What is the difference between Mirror and Two Way sync?
Mirror makes the destination an exact copy of the source — new and changed files are copied over, and files deleted from the source are removed from the destination. Two Way merges changes from both sides, so the newest version of each file ends up in both folders. For backups, Mirror is the safer choice.

Conclusion

FreeFileSync replaces hopeful copying with a checked, repeatable routine: compare, review, sync, done — and your backup is a true copy, not a guess. Download it free from the official website, save your first backup configuration, and keeping a second copy of your files becomes a two-click habit.

Download FreeFileSync from the Official Website

FreeFileSync for PC: How to Download and Install on Windows (2026 Guide)