Many Windows users report facing the external hard drive parameter is incorrect issue on their computers. The error pops up as soon as you connect your external HDD and try to access its data. If you’re facing this problem, then use the guide below to easily fix the parameter is incorrect error on your external hard drive.

Why Do You Get Parameter is Incorrect Error on External Hard Drive?

The most common reason behind the parameter is incorrect error on an external hard drive, is a corrupt or damaged file system. A corrupt file system is typically caused by one of the following reasons:

  • ↩️ Improper Ejection: Abruptly removing your external hard drive, without ejecting it from Windows first, can cause logical damage to your drive. This, in turn, can damage the file system of the drive, especially if it was being read or written to.
  • 🔌 Improper Connection: A loose or damaged connector can cause read/write issues on your drive. Additionally, your PC may not detect the external hard drive at all or display a message that the external hard drive’s parameter is incorrect. It’s recommended that you connect your drive to a port that’s directly on the motherboard and try using different cables, if you suspect this is the case.
  • 📛 Physical Damage: Physical damage can cause numerous issues on your external hard drive, including a corrupt file system that subsequently results in the parameter is incorrect error on your drive. Physical damage is best dealt with by experts, because it’s really easy to cause further irreversible damage to the drive if you don’t have the necessary expertise.
  • ⚠️ Unexpected Power Outages: Power outages and surges can damage your PC’s hardware, including the external hard drive. A sudden power cut, while the PC is writing or reading data from the drive, can corrupt its files and the file system. Thus, it’s always recommended you have a UPS or some sort of surge protection to keep your data safe.
  • 🚫 Corrupted File System: A corrupted file system can cause Windows to display the parameter is incorrect issue. There are numerous reasons behind a corrupt system, including virus attacks, improper usage, and physical damage.
  • 🔣 Decimal Symbol Configuration: In some cases, improper decimal symbol (.) configuration, i.e. using some other symbol instead of the dot symbol. This typically happens when you use a regional keyboard configuration.
  • 🔒 BitLocker Encrypted Drive: In rare instances, BitLocker Encryption can cause the parameter is incorrect error on your external hard drive. It’s recommended that you turn off BitLocker. Remember to first recover data from the BitLocker encrypted drive and then attempt to fix it.

How to Recover Data From External Hard Drive With Parameter is Incorrect Error

The most economical and user-friendly way to recover data from an external hard drive that shows “Parameter is incorrect,” is to use a third-party data recovery program. Since the first data recovery scan’s success rate is usually the highest, it’s important to choose an option, only from the best data recovery apps in the market.

In our tutorial, we’ll use Disk Drill Data Recovery to recover a drive that is not accessible due to the parameter is incorrect error on Windows 10/11. The program has a near perfect recovery rate from all file systems, and the simple UI makes the program easy to use. Disk Drill is compatible with Windows XP and macOS 10.5 onwards. You can even download and run it on virtual machines that run Windows or macOS.

Here is how to recover data if Windows displays parameter is incorrect on an external hard drive, using Disk Drill:

  1. Download Disk Drill and install it.
  2. Connect the external hard drive that’s prompting Windows to display the parameter is incorrect error.
  3. Open Disk Drill, select the relevant external hard drive from the list and click on Search for lost data.Disk Drill home screen.
  4. Click on Review found items to display the recoverable files. You can filter the type of files you want to recover by directly clicking the Video, Pictures, Audio, Documents, or Archives option.Review found items screen in Disk Drill.
  5. Since the files you want to recover already exist on the external HDD, you can expand the Existing section (as shown in the image below) to view them. However, if you want to recover old, deleted data, feel free to expand the other sections too.Data recovery subsections.
  6. Using the checkbox next to them, select the files you want to recover. Preview files by clicking the eye icon next to each file. After confirmation, click on Recover.List of recoverable files in Disk Drill.
  7. Choose a recovery destination and click Next.Recovery destination prompt in Disk Drill.
  8. Disk Drill will recover the selected files.Data recovery complete screen.

How to Fix the Parameter is Incorrect Issue on External Hard Drive

Once you recover data from your external hard drive using Disk Drill, you can proceed to fix the parameter is incorrect error on your hard drive. In this section, we’ll take a look at three methods to do the same.

Method 1: Check or Replace the External Hard Drive Connection

The first thing to check when attempting to fix the external hard drive parameter is incorrect issue, is to check the drive’s connection to your computer. Here are some things you should do:

  • Ensure that the USB cable and the USB ports are not damaged.
  • Connect the external hard drive to one of the USB ports on the motherboard.
  • Try using different USB cables and see if the parameter is incorrect error persists.

Method 2: Fix the External Hard Drive Partition Using TestDisk

If the external hard drive is not accessible and shows clear signs of partition corruption (e.g. the external hard drive became RAW), you can use a partition recovery and repair software called TestDisk to resolve the issue.

TestDisk uses a command-line interface, so closely follow the steps listed below to fix the parameter is incorrect error on your external hard drive:

  1. Download TestDisk, extract the zip file, and run the testdisk_win.exe file.
  2. You’ll be asked whether you want to create a log file, choose the desired option using the arrow keys on your keyboard, and press Enter to confirm.Log file creation screen in TestDisk.
  3. Select the external hard drive that shows parameter is incorrect. Ensure that you’re on the Proceed option and press Enter.Drive selection screen in TestDisk.
  4. Select the partition table by highlighting the relevant option and pressing Enter. TestDisk highlights the correct partition table by default, so it’s recommended you simply press Enter on this screen.Partition table selection screen in TestDisk.
  5. Now, select the Analyse option and press Enter.Analyze option in TestDisk.
  6. Ensure that the Quick Search option is highlighted and press Enter.Quick Search option in TestDisk.
  7. Use the left and right arrow keys and make sure there is a P before the partition name, as highlighted in the image below.Primary partition initial in TestDisk.
  8. On this screen, you can press P to list the recoverable files. After viewing the files, press Q to go back to the previous screen.List of files in TestDisk.
  9. Press Enter and then select the Write option. If prompted, press Y and TestDisk will recover the partition from your external hard drive.The Write option in TestDisk.

Method 3: Format the External Hard Drive

If none of the methods above helped you fix a drive that is not accessible because of parameter is incorrect error on the external hard drive, the last resort is to simply format the drive. Formatting will completely remove all the data from your external drive. Thus, be sure to first recover all the data from your external hard drive without formatting, using Disk Drill.

You can use Disk Management to easily format the external hard drive:

  1. Type “disk management” in Windows Search (Windows Key + S), and click the Create and format hard disk partitions option from the search results.Disk Management in Windows Search.
  2. Right-click on the external hard drive that shows parameter is incorrect and click Format.Format option in Disk Management.
  3. Modify the Format parameters according to your needs and click OK.Format parameters in Disk Management.
  4. Windows will format the external hard drive.



The parameter is incorrect issue is not that difficult to fix, provided you follow the steps above carefully. Programs like Disk Drill are crucial in such cases because they help you keep your data, in case formatting is the only way to fix the drive. Another good practice, is to regularly create backups of all your data in multiple places, such as the cloud, and other storage drives.