Software⏱️ 3 min read📅 2026-06-15

How to Fix: What should I do when i get this data cyclic error trying to copy files?

Error fixing cyclic redundancy check during file copy.

Quick Answer: Run a disk check to identify and fix any errors on the external hard drive.

When you encounter the 'Data error (cyclic redundancy check)' error while copying files, it can be frustrating and cause concern about the integrity of your data. This error typically occurs when there is a problem with the file system or disk errors on either the local hard drive or external hard drive.

Fortunately, this issue is usually not a sign of a hardware failure or data loss, but rather a software-related problem that can be resolved through troubleshooting and potentially fixing the source of the error.

⚠️ Common Causes

  • The primary cause of this error is a corrupted file system on either the local hard drive or external hard drive. This corruption can occur due to various reasons such as power failures, disk errors, or software malfunctions.
  • Another possible reason for this error is that the file being copied has become damaged or corrupted during the transfer process.

🔧 Proven Troubleshooting Steps

Checking and repairing the file system

  1. Step 1: Step 1: Open a command prompt as an administrator on both the local hard drive and external hard drive. Type 'chkdsk' (for Windows) or 'fsck' (for macOS/Linux) to scan for disk errors.
  2. Step 2: Step 2: Run the disk check utility to identify and repair any file system corruption. If the utility detects issues, it will prompt you to confirm whether you want to fix them.
  3. Step 3: Step 3: After repairing the file system, try copying the file again to see if the error persists.

Checking for corrupted files

  1. Step 1: Step 1: Open a file explorer or disk management tool on both the local hard drive and external hard drive to inspect the files being copied.
  2. Step 2: Step 2: Look for any damaged or corrupted files and attempt to repair them using a file repair tool or by re-downloading the file from its original source.

✨ Wrapping Up

If you have tried the above steps and still encounter the 'Data error (cyclic redundancy check)' error, it may be worth considering seeking professional help from an IT expert. However, in most cases, these troubleshooting methods should resolve the issue and allow you to copy files successfully.

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