Getting Started

• How to Install FreeFileSync on Windows 11 — Install FreeFileSync on Windows 11, verify the download, and prepare a safe first comparison.
• How to Install FreeFileSync on Windows 10 — Set up FreeFileSync on Windows 10 and complete the first folder comparison without changing files.
• FreeFileSync First Sync: Beginner Walkthrough — Configure a cautious first synchronization and verify the direction before copying or deleting files.
• FreeFileSync Portable on Windows: Setup Guide — Understand portable availability, profile storage, updates, and safe use on multiple Windows PCs.
• FreeFileSync Interface Explained — Learn the folder selectors, comparison grid, filters, and synchronization controls in the Windows interface.
• How to Compare Two Folders with FreeFileSync — Compare two folders and interpret equal, different, newer, missing, and conflict results before syncing.
• Save and Reuse a FreeFileSync Configuration — Save a reviewed GUI configuration and reuse it without rebuilding every option.

Synchronization Modes

• FreeFileSync Two-Way Sync Explained — Use database-assisted two-way synchronization and understand conflicts, deletions, and first-run behavior.
• FreeFileSync Mirror Sync Explained — Make a target match a source while reviewing deletion risk and direction before every mirror run.
• FreeFileSync Update Sync Explained — Copy new and changed source files without deleting extra items already stored at the destination.
• Configure a Custom Sync in FreeFileSync — Build custom left-to-right and right-to-left rules for a clearly defined file workflow.
• Compare by File Time and Size — Understand timestamp and file-size comparison, tolerance, daylight-saving shifts, and limitations.
• Compare Files by Content in FreeFileSync — Use content comparison when timestamps are unreliable and account for the additional disk-reading cost.
• FreeFileSync and Symbolic Links on Windows — Choose how junctions and symbolic links are handled without creating recursion or unexpected copies.
• Use File Versioning in FreeFileSync — Keep replaced and deleted files in a versioning folder and plan retention outside the live destination.

Backup Workflows

• Back Up Windows to an External Drive — Create a reviewable external-drive backup job with stable drive paths, versioning, and verification.
• Synchronize a USB Drive with FreeFileSync — Synchronize removable storage while avoiding wrong-drive selection and unsafe unplugging.
• Back Up the Windows Documents Folder — Protect personal documents with a repeatable configuration and a separate recovery check.
• Back Up a Photo Library with FreeFileSync — Copy photo libraries while preserving originals, metadata, folder organization, and recovery copies.
• Synchronize Large Files Efficiently — Plan comparisons and transfers for videos, disk images, and other large files without assuming delta copying.
• Synchronize Multiple Folder Pairs — Combine several reviewed folder pairs in one configuration without confusing source and destination roles.
• Exclude Files and Folders with Filters — Write and test inclusion and exclusion filters before applying them to an important synchronization job.
• How to Verify a FreeFileSync Backup — Confirm that a backup is readable and complete through logs, comparison, and sample restore testing.

Storage, NAS and Cloud

• Synchronize Files with a NAS — Use UNC paths or mapped shares and handle credentials, availability, and network interruptions.
• Sync a Windows Network Share — Configure a network-share job and distinguish connection errors from file permission problems.
• Use SFTP with FreeFileSync — Configure an SFTP connection, verify the host, and understand remote timestamp behavior.
• FreeFileSync and Google Drive — Understand supported cloud connections, account authorization, quotas, and safer test runs.
• Synchronize a Local OneDrive Folder — Work with the Windows OneDrive folder while accounting for placeholders and Files On-Demand.
• Synchronize a Local Dropbox Folder — Avoid conflicting sync engines when FreeFileSync and Dropbox both observe the same local files.
• Copy NTFS Permissions with FreeFileSync — Decide when Windows ACL copying is appropriate and test permissions with a non-critical folder first.
• FreeFileSync and Long Windows Paths — Diagnose path-length, naming, filesystem, and destination compatibility problems.

Automation

• Create a FreeFileSync Batch Job — Convert a reviewed GUI configuration into a batch job with controlled error handling and logs.
• Schedule FreeFileSync with Task Scheduler — Run a batch job through Windows Task Scheduler with the correct account, paths, and permissions.
• Set Up RealTimeSync on Windows — Monitor selected folders and trigger a reviewed batch job after changes settle.
• FreeFileSync Command Line on Windows — Start saved configurations from scripts without inventing unsupported command-line switches.
• FreeFileSync Email Notifications Explained — Understand edition availability and configure alerts without exposing account credentials.
• Read FreeFileSync Log Files — Use log files to distinguish successful copies, warnings, skipped items, and failed operations.
• Shut Down Windows After a Sync Job — Add post-sync shutdown only after the job is reliable and failures remain visible.

Troubleshooting

• Fix FreeFileSync Access Denied Errors — Diagnose permissions, locked files, protected folders, and network credentials in a safe order.
• FreeFileSync Cannot Copy Files in Use — Identify applications locking files and choose retry, skip, or application-aware backup methods.
• Fix the Wrong Synchronization Direction — Stop the job, protect remaining copies, and correct source, destination, and sync rules.
• Resolve FreeFileSync Sync Conflicts — Review conflicts rather than overwriting both sides and rebuild the database only when appropriate.
• Fix Network and NAS Connection Errors — Separate DNS, credentials, share availability, VPN, firewall, and file-level problems.
• Why FreeFileSync Is Slow — Check comparison mode, small-file overhead, antivirus scanning, network latency, and destination speed.
• Recover After an Incorrect FreeFileSync Job — Stop further writes, inspect versioning and backups, and avoid actions that overwrite recoverable data.

Windows Troubleshooting and Backup Decisions

Practical help for common synchronization failures, backup recovery, removable drives and mode selection.

• FreeFileSync Mirror vs Update on Windows: Which Is Safer?
• FreeFileSync Not Syncing New Files: Windows Checklist
• FreeFileSync Folder Pair Missing or Wrong Drive: Fix Paths
• FreeFileSync Backup vs Sync: How to Keep Recoverable Copies
• FreeFileSync Scheduled Task Runs but Copies Nothing
• FreeFileSync External SSD Backup Checklist for Windows 11
• FreeFileSync Two-Way Conflict Example: What Happens to Edits?
• FreeFileSync NAS Backup Failed: SMB and Windows Checks