One of the most common problems users face with Carbonite is when files stop backing up. This can happen due to software errors, network issues, or incorrect settings. If left unresolved, it puts your important data at risk.

This guide explains why Carbonite might not back up files and provides step-by-step solutions for Windows, Mac, and business users.

Why Carbonite Might Not Be Backing Up Files

Some common reasons include:

• Backup Service Not Running: Carbonite must be active to perform backups.

• Paused or Stopped Backup: Backups can pause automatically due to system or network conditions.

• Unsupported File Types: Certain files or locations may be excluded.

• Disk Space Issues: Insufficient storage on your local drive or cloud account.

• Software Outdated: Older versions may have bugs or compatibility issues.

• Firewall or Antivirus Interference: Security software can block backup operations.

• Network Problems: Slow or disconnected internet can interrupt backups.

Step-by-Step Solutions to Fix Carbonite Not Backing Up

1️⃣ Check the Backup Status

Windows:

1. Look at the Carbonite icon in the system tray.

2. Ensure the status shows Backing Up or Idle — waiting for files.

3. If it’s paused, right-click the icon and select Resume Backup.

Mac:

1. Check the Carbonite menu bar icon.

2. Ensure it’s not paused or waiting.

3. Resume backup if necessary.

2️⃣ Verify Subscription and Account

• Make sure your Carbonite subscription is active.

• Ensure you are logged into the correct account.

• Check storage limits; exceeding them can prevent backup.

3️⃣ Update Carbonite Software

• Open Carbonite → Settings → Check for Updates

• Install the latest version.

• Restart your computer after updating.

4️⃣ Check File Selection

• Open Carbonite settings → Files and Folders.

• Ensure the files or folders you want to back up are selected.

• Remove unsupported file types from the selection list.

5️⃣ Free Up Disk Space

• Carbonite needs temporary local space to prepare files for upload.

• Delete unnecessary files or move them to another drive.

• Retry backup after freeing space.

6️⃣ Check Firewall & Antivirus

• Ensure your security software isn’t blocking Carbonite.

• Add Carbonite as an exception in firewall or antivirus settings.

• Temporarily disable antivirus to test if it resolves the issue.

7️⃣ Network & Connectivity

• Verify your internet connection is stable.

• Restart your router if backups fail repeatedly.

• Avoid heavy network usage during backup.

• Try switching networks if possible to see if ISP restrictions are causing issues.

8️⃣ Restart Carbonite Service

Windows:

1. Press Ctrl + Shift + Esc → Task Manager → Services tab.

2. Locate Carbonite Backup Service → Right-click → Restart.

Mac:

1. Open Activity Monitor.

2. Locate Carbonite processes → Quit → Restart Carbonite app.

9️⃣ Check Backup Logs

• Windows: C:\ProgramData\Carbonite\Logs

• Mac: ~/Library/Logs/Carbonite/

• Look for error codes or files failing to upload.

• Use the error codes to troubleshoot or contact support.

10️⃣ Reinstall Carbonite (If Needed)

• Uninstall Carbonite completely.

• Restart your computer.

• Download the latest version from your account.

• Reinstall and sign in.

• Retry backup.

Business Users: Fixing Backup Issues

• Check endpoint agent installation and status.

• Ensure server or NAS devices are online.

• Verify Microsoft 365 or server integrations are configured correctly.

• Contact Carbonite business support for persistent issues with multiple endpoints.

Preventing Backup Problems in the Future

• Keep Carbonite updated regularly.

• Monitor backup status daily or weekly.

• Ensure adequate storage and internet bandwidth.

• Avoid moving or renaming files during active backup.

• Schedule backups during off-peak hours for large datasets.

Frequently Asked Questions (FAQs)

Q1: Will my existing backups be affected?
No. Existing cloud backups remain intact.

Q2: How long does a stuck backup take to fix?
Depending on file size and network speed, it can take minutes to a few hours.

Q3: Can unsupported files ever be backed up?
Only if moved to a supported location or format.

Q4: Do I need admin rights to fix backup issues?
Yes, some troubleshooting steps like restarting services or reinstalling require admin access.

Final Thoughts

When Carbonite is not backing up files, it’s usually caused by paused backups, connectivity issues, or software conflicts. By following these steps — checking status, updating software, verifying account, adjusting settings, and troubleshooting network/firewall — you can get backups running smoothly again.

Regular monitoring and preventive steps reduce the chance of future interruptions, keeping your data safe and accessible at all times.