How to fix cyclic redundancy check issues in external hard drive

A Cyclic Redundancy Check, or CRC, is a tool that Windows uses to check a hard drive to verify that the drive is working properly. Usually, this error occurs when you try to move some files or extract large compressed files. CRC issues on your system can be caused by almost anything, from a corrupted registry, insufficient free space on the disk, to misconfigured system files.

Solutions -

You should try these quick and easy fixes before moving on to the main solution.

1. Restarting the system may help you solve the problem.

2. If you are using a removable drive, you can detach the drive and reconnect it. Check if the USB drive stops showing CRC issues.

Test if this works.

Fix 1 – Try a Error Checking Tool

Windows has a bug checking tool for drives.

1. Open File Explorer.

2. If you go to "This PC" in the left pane. You can see all your drives there. Now, right click on the drive and click on "Properties".

3. Next, go to the “Tools” section.

4. Here you will find the "Error Checking" section. Just click "Check".

# 6. You may or may not see the "You do not need to scan this drive" message. However, you must scan this drive.

7. Now, click on “Scan and Repair Drive” to repair the drive.

After running the tool, test whether it is feasible.

8. After the test, click "Close".

Trying to access a file or transfer some files to the drive. If the CRC mismatch still occurs, proceed to the next fix.

Fix 2 – Use the chkdsk command

If the error checking tool does not work, you can use the chkdsk command.

Step 1

You must know the drive letter of the drive. If you already know this, you can skip this step.

1. Therefore, press Win key E key combination to open File Explorer.

2. Then, go to "This PC" in the left pane.

3. Check the drive letter of the drive where you are encountering this CRC error.

in our example is " F: ".

After you complete this operation, feel free to close File Explorer.

Step 2

1. Just enter "cmd" in the search box.

2. Then, right-click "Command Prompt" and click "Run as administrator".

This will allow you to open the command prompt as an administrator.

3. Once done, just write this command, modify it and press Enter.

chkdsk 盘符：/f /r /x

[

You must replace the drive letter with the drive letter you noted earlier.

For example - if the drive letter is " F: ", the command will be like this -

chkdsk F: /f /r /x

]

##Let Windows find and fix the problem on the drive. Test if this works for you. Once the scan is complete, you can close the terminal.

Check if you are still facing CRC error.

Fix 3 – Run a System File Checker scan

You can always run an SFC check to let Windows handle the scan operation and resolve the issue.

1. You can right-click the

Windows key and click the "Run" option.

2. Then, type "

cmd " and press the Ctrl Shift Enter key simultaneously to access a terminal with administrative rights.

3. We will first run an SFC scan. Therefore,

Paste this command and press Enter to start the SFC scan.

sfc /scannow

Wait for the SFC scan to complete.

4. You can then run the DISM tool check with just one code. Just this line in the terminal and hit

Enter.

DISM.exe /Online /Cleanup-image /Restorehealth

Let Windows complete the DISM scan.

After the scanning process reaches 100%, close the command prompt and

restart the system.

Fix 4 – Format the Drive

If no other method solves the problem, you must format the drive.

NOTE – Formatting will erase all data from the drive. Therefore, if you have something useful, you should backup your data before formatting the drive.

1. Simply open the File Explorer page and go to "This PC" to find the drive.

2. Now, once you find it, right-click on the drive and click on "Format".

3. After opening the drive format page, click "Format" to format the drive.

This will quickly format the drive. So, wait until it ends and then test if the CRC error still exists.

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