Fixed: Samsung Data Migration Interrupted for Unknown Reason

What causes SDM interrupted for unknown reason?

When using Samsung Magician to transfer data from HDD to Samsung SSD, you may receive an error, “The Data Migration function has been interrupted for an unknown reason.” Don’t worry – you are not alone. Here are some common causes for the error:

🔍 USB/SATA bandwidth contention

🔍 Antivirus or background software conflicts

🔍 Using an outdated version of Samsung Data Migration

🔍 Bad sectors or disk errors on source drive

🔍 Insufficient system resources

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How to fix Samsung Data Migration interrupted for unknown reason

If Samsung Data Migration stuck at 99% or interrupted suddenly, you can try one of the following ways to fix it.

Fix 1: Disconnect unnecessary peripherals

Samsung Data Migration can conflict with external devices during the cloning process, especially if those devices are storage-related or use drivers that interfere with SDM. Here’s how to fix it:

1. Shut down your computer.

2. Unplug all non-essential peripherals, including USB flash drives, external hard drives, printers, cameras, card readers, game controllers and dongles.

3. Leave only the essentials connected: keyboard, mouse, monitor, source drive and target Samsung SSD.

4. Boot up your PC and run Samsung Data Migration again.

💡 Tip: If you're using a laptop, make sure no SD cards or external drives are inserted during the cloning attempt.

Fix 2: Disable antivirus/firewall temporarily

Security software—especially real-time antivirus or firewall systems—can block Samsung Data Migration from accessing system files or writing to the target SSD. Follow these steps to disable it temporarily:

1. Save your work and close all open applications.

2. Temporarily disable your antivirus software:

👉 For Windows Defender:

• Go to Settings > Update & Security > Windows Security > Virus & threat protection.
• Click Manage settings and toggle Real-time protection off.

👉 For third-party antivirus (e.g., Norton, Avast, McAfee):

• Right-click the antivirus icon in the system tray.
• Choose Disable temporarily or Pause protection, and confirm if prompted.

3. Turn off the firewall:

• Go to Settings > Update & Security > Windows Security > Firewall & network protection.
• Select Public network. Find the "Microsoft Defender Firewall" section, and toggle it off.

• Do it for Private network as well.

4. Run Samsung Data Migration as administrator. After the cloning is complete, re-enable your antivirus and firewall immediately.

Fix 3: Update SDM

Older versions of Samsung Data Migration often lack support for newer SSD models, Windows updates, or file system changes—leading to compatibility errors or unexplained interruptions. Follow the steps below to update SDM:

1. Uninstall the current version of Samsung Data Migration from your PC.

2. Visit Samsung’s official support website and download the newest version of Samsung Magician (SDM has been integrated into Samsung Magician now).

3. Install Samsung Magician. Restart your PC and try the cloning process again.

Fix 4: Check the source disk for errors

If the source drive has bad sectors, file system corruption, or unreadable data blocks, Samsung Data Migration may fail silently or produce the generic "interrupted" error. You can fix it as follows:

1. Press Windows + S, type cmd, then right-click Command Prompt and select Run as administrator.

2. In the Command Prompt window, type chkdsk C: /f /r /x and press Enter to check the source drive.

💡 Tip: If there are multiple partitions on the source drive, replace C: with other drive letters to check them one by one.

3. If prompted to schedule the scan at the next reboot, type Y and press Enter.

4. Restart your computer. The tool will then find any bad sectors and attempt to repair them.

Fix 5: Clone in Safe Mode

Booting into Safe Mode minimizes driver conflicts and disables background services or third-party software that could interfere with Samsung Data Migration during the cloning process. Follow the instructions below to clone your disk in Safe Mode:

1. Press Windows + R, type msconfig and hit Enter to open System Configuration.

2. In the Boot tab, check Safe boot and select Minimal. Click Apply and OK, then restart your computer.

3. Run Samsung Data Migration as administrator and proceed with the cloning process.

4. Once cloning is complete, open System Configuration again. Uncheck Safe boot, click Apply, and restart your system to normal mode.

💡 Tip: Not all USB drivers function properly in Safe Mode. If your SSD is connected via USB, make sure the port works in Safe Mode or connect the SSD via SATA if possible.

Bonus: Best alternative to Samsung Data Migration

If you've tried all the fixes and Samsung Data Migration still fails or feels too limited, AOMEI Cloner is an excellent alternative. It supports more SSD brands, handles bad sectors better, and provides more advanced cloning features with fewer compatibility issues.

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• It offers Disk Clone, System Clone, and Partition Clone options.
• It can intelligently skip bad sectors during the cloning process.
• It allows you to align partitions for SSD optimization.
• It supports all brands of SSDs, including Samsung, Crucial, WD, Kingston, and more.

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Download AOMEI Cloner and use it to clone your HDD to Samsung SSD now:

Step 1. Install and open AOMEI Cloner. Navigate to Clone and choose Disk Clone.

Step 2. Choose the hard drive you're cloning from (your current HDD), then select your new Samsung SSD as where you want to copy everything to.

Step 3. Enable SSD Alignment for optimal performance. Finally, click Start Clone to begin the process.

Summary

If you're facing the Samsung Data Migration interrupted for unknown reason error, don’t worry. There are five proven fixes offered in this article to help you out. If SDM continues to fail, using a powerful alternative like AOMEI Cloner offers a reliable, user-friendly way to clone your drive without frustration. It makes SSD data migration as easy as pie. Don’t hesitate to try it out!