Sync Conflicts Explained

A sync conflict occurs when a cloud storage client (such as OneDrive, Google Drive, or Dropbox) detects that a single file was edited in two different locations simultaneously, or updated offline on one device while being modified online by someone else. To prevent data loss, the sync engine will not overwrite either file; instead, it saves both, appending the second file with a suffix like “conflicted copy”, “mismatched version”, or the name of the editing computer.

This guide outlines how to find, compare, and merge conflicted files, and how to stop conflicts from happening on Windows and macOS.

1. What Triggers a Sync Conflict?

File sync conflicts are caused by three main collaborative and network behaviors:

• Lack of Co-authoring Support: Non-Office formats (like .txt, .pdf, .psd, or .zip) do not support real-time co-authoring. If two people open these files at the same time, a conflict is guaranteed.
• Offline Modifications: Editing a file on your laptop while disconnected from the internet, while another user edits the same file online. When you reconnect, the cloud server sees two different updates with overlapping timelines.
• High Latency Sync Delays: Stale client connections fail to lock the server file before another user begins editing, causing both changes to push concurrently.

A. Run a Conflict Finder Script

1. Press Windows Key + X and select Terminal or PowerShell.
2. Run this command to search your cloud directories for files containing common conflict keywords:

   # Search for conflict files in your user profile
   Get-ChildItem -Path "$HOME\OneDrive", "$HOME\Dropbox", "$HOME\Google Drive" -Recurse -File | Where-Object { $_.Name -like "*conflict*" -or $_.Name -like "*(1)*" -or $_.Name -like "*copy*" } | Select-Object FullName, Length

B. Merge and Resolve the Conflict

1. Open the primary document and the conflicted copy side-by-side.
2. If using Microsoft Word: Go to the Review tab → click Compare → select Compare… to see the differences.
3. Merge the changes into the primary file.
4. Delete the conflicted copy to clean up your sync queue.

A. List and Compare Conflicted Files

1. Open Terminal (via Spotlight search).
2. Run this command to find conflict files:

   # Search under standard synced directory locations
   find ~/Library/CloudStorage/ -type f \( -name "*conflict*" -o -name "*copy*" -o -name "*(*" \)

3. To compare the text contents of two conflicting text files, run:

   diff -u "OriginalFile.txt" "ConflictedFile.txt"

B. Clean Up and Re-Sync

1. After merging contents into your master file, delete the conflicted file to let the sync engine clear the database flag:

   rm "ConflictedFile.txt"

4. Best Practices to Prevent Sync Conflicts

• Use Web-based Co-authoring: When collaborating on Office documents, edit them in the browser (Office Online) to ensure real-time changes are synchronized keystroke-by-keystroke.
• Check Out Files: In SharePoint or shared environments, use the Check Out feature to lock the file for editing, blocking others from opening it until you check it back in.
• Sync Before Editing: Always ensure your desktop client is fully synced (check tray icon status) before opening shared files.
• Communicate with Teams: If editing binary files (like Photoshop .psd or AutoCAD .dwg), notify your team to avoid overlapping edit windows.

5. Summary Reference Checklist

• Run Scan Script: Use PowerShell or Terminal find commands to locate hidden duplicate conflict files.
• Compare Differences: Utilize Word’s Compare feature or terminal diff to audit content changes.
• Consolidate Masters: Merge all edits into the primary file name, then delete the duplicate.
• Implement Checkouts: Configure document libraries to require checkouts for non-collaborative files.
• Verify Sync Status: Wait for the green checkmark icon in the system tray before starting work.