How to Fix “The Parameter Is Incorrect” Error on External Hard Drives

In this guide, we’ll show you how to diagnose the cause, recover inaccessible data safely, and troubleshoot the connection, BitLocker, drivers, and Windows itself. We’ll then cover CHKDSK and other file system repair options, with formatting left as a last resort.

What Does “The Parameter Is Incorrect” Mean?

“The parameter is incorrect” is a generic Windows error rather than a diagnosis of hard drive corruption. Windows associates this message with the system error ERROR_INVALID_PARAMETER, also known as error 87 or 0x57, which indicates that an invalid parameter was passed during an operation. Since this error can occur in many unrelated Windows processes, the message alone doesn’t tell you what is wrong with your external drive.

When the error appears as you try to open an external HDD, SSD, or USB drive, it generally means that Windows can detect enough of the device or volume to attempt access, but something prevents that request from completing correctly. This doesn’t automatically mean that the file system is corrupted or that the drive has bad sectors, physical damage, or malware.

To narrow down the actual cause, you need to check whether the connection is stable, how the drive appears in Disk Management, whether its file system and correct capacity are reported, its BitLocker state and overall health, and whether the same drive works when connected to another USB port or computer. We’ll use these checks to distinguish between the possible causes in the sections below.

What Are the Reasons Behind the Parameter Is Incorrect Error?

Since “The parameter is incorrect” is a generic Windows error, there isn’t one specific problem behind it. The cause can be as simple as a faulty USB cable or as serious as a failing drive. That’s why it’s better to start with the connection and the information Windows reports about the drive before attempting any repairs.

The table below covers the most likely causes, what they typically look like, and what you should check first.

Check the Drive in Disk Management Before Trying to Fix It

Before you run CHKDSK, reinstall drivers, or try any other repair, check how Windows currently sees the external drive in Disk Management. This can quickly tell you whether Windows still recognizes the volume and its file system or whether you’re dealing with a RAW, Unallocated, or potentially failing drive.

Follow these steps:

1. Right-click Start and select Disk Management.
2. Locate your external drive. Use its total capacity, disk number, partition size, and volume label (if available) to identify it. Don’t rely on the drive letter alone, since it may be missing or different from what you expect.
3. Check whether Windows reports the correct total capacity and whether the expected partition is present.
4. Look at the File System column. A normally recognized Windows-compatible volume will typically appear as NTFS or exFAT, while a damaged or unrecognized file system may appear as RAW.
5. Check whether the volume has a drive letter and review its current status.

Don’t initialize the disk, format it, create a New Simple Volume, or run write-based repair commands just because something looks abnormal in Disk Management. These actions can modify the current disk or file system structure. If the drive contains important inaccessible data, secure that data first or create an image of the drive where possible.

Use the table below to determine what your Disk Management results mean and what you should do next.

How to Recover Data from Hard Drive With the Parameter Is Incorrect Error

If important files became inaccessible after the “The parameter is incorrect” error appeared, we recommend recovering them before moving on to CHKDSK, file system repair, formatting, or other methods that can write changes to the drive. However, the right recovery approach depends on how the external drive behaves.

Situation 1: The drive is stable and shows the correct capacity

If the external HDD, SSD, or USB drive stays connected and Disk Management reports its correct capacity, you can try scanning it with data recovery software. File Explorer doesn’t need to open the volume normally for this to work. As long as the physical device remains detectable and the software can access it, a recovery scan may still find the files stored on it.

For this guide, we use Disk Drill. It can scan external drives that Windows detects even when their volumes are inaccessible through File Explorer, and it supports common file systems such as NTFS, FAT32, and exFAT.

Situation 2: The drive is unstable

If the drive disconnects, freezes during reads, produces repeated I/O errors, becomes extremely slow, or has unreadable areas, avoid repeatedly scanning the original device. Each additional read attempt puts more stress on a drive that may already be failing.

When safely possible, create a byte-to-byte image of the drive first. You can then attach the image in Disk Drill and scan it instead of repeatedly reading the original storage device. This also gives you a fixed copy to work with if the condition of the original drive gets worse.

Situation 3: The drive shows 0 bytes, No Media, the wrong capacity, or won’t stay detected

Data recovery software needs access to the underlying storage to scan it. If Disk Management reports 0 bytes, No Media, an obviously incorrect capacity, or the drive keeps disappearing, don’t assume that Disk Drill or another recovery application will be able to access your files.

First, connect the drive directly to the computer, try another cable and USB port, test it on another computer, and, where appropriate, try another compatible enclosure. If Windows still can’t access the underlying storage correctly, software recovery may not be possible and professional data recovery may be required.

If your external drive remains detectable with its correct capacity but you can’t access the files normally, you can try to recover them with Disk Drill. Unlike File Explorer, data recovery software can scan many inaccessible external drives as long as Windows can still access the underlying storage with a usable capacity.

Before you start, connect another physical storage device with enough free space for the recovered files. Where practical, install Disk Drill on an unaffected drive rather than the one you’re trying to recover.

Follow these steps to recover your files:

1. Download, install, and launch Disk Drill.
2. Check the condition of the affected drive before starting the scan. If it stays connected and reads normally, you can scan it directly. If it disconnects, becomes extremely slow, produces read errors, or shows other signs of instability but is still readable, open Byte-to-byte Backup instead.
3. For an unstable drive, select the affected physical disk in Byte-to-byte Backup and create a byte-to-byte image on another physical storage device. Once the image has been created, open it in Disk Drill and continue the recovery from the image rather than repeatedly scanning the original drive.
4. If the source drive is stable, select the affected physical drive or volume directly from Disk Drill’s device list.
5. Click Search for lost data, then choose Universal Scan.
6. You can review the files Disk Drill finds while the scan is still running or wait until it finishes. Check the Existing, Deleted, and Reconstructed result groups depending on what you’re looking for.
7. Use the filename search and filters for file type, size, and date to narrow down the results. You can also preview files and check their recovery chances to help determine which ones are worth recovering.
8. Select the files you need and click Recover.
9. Choose a folder on a different physical storage device as the recovery destination. Don’t save recovered files back to the affected external drive.
10. Once recovery is complete, open several important recovered files and verify that they work correctly. Only after you have secured and checked your data should you move on to repair or format the original drive.

At Pandora Recovery, we have conducted thorough testing and analysis of various data recovery tools. As a result, our specialized data recovery tool comparison engine provides recommendations tailored to specific scenarios. Additionally, our interactive software picker and detailed reviews can assist you in choosing the most suitable recovery application for your unique needs.

How to Fix the Parameter is Incorrect Error

Once you’ve secured your data through hard drive recovery, it’s time to explore solutions to fix “The parameter is incorrect” error on the hard drive.

Method 1: Check Your External Hard Drive Connection

A faulty or unstable connection is one of the first things you should rule out when an external drive shows “The parameter is incorrect.” Disconnect the drive, reconnect it, and check whether Windows can access it normally. If the error remains, try another USB port on your computer. Whenever possible, connect the drive directly instead of using a USB hub or docking station.

Next, try another compatible USB cable or adapter and test the drive on another computer. If it works there, the problem is more likely related to the original computer, USB port, or connection rather than the drive itself.

If the problem occurs only when the drive is connected through a USB hub or docking station, disconnect unnecessary peripherals, try another port on the hub, and make sure the hub receives adequate power. You can also bypass it completely and connect the external drive directly to the computer.

The enclosure itself can also be responsible. If your HDD or SSD uses a removable external enclosure, its USB bridge or other electronics may fail even when the storage device inside is still functional. Where practical, you can test the drive with another compatible enclosure or adapter.

Method 2: Scan Your System For Viruses

Malware isn’t a likely cause of “The parameter is incorrect” on its own. However, if you’ve noticed other signs of infection, such as suspicious activity or unexpected file changes, scan Windows and any accessible files on the external drive.

1. Press Windows Key + S, search for Windows Security, and open it.
2. Select Virus & threat protection.
3. Click Scan options.
4. Choose the appropriate scan. If Windows can access the external drive well enough to scan it directly, select Custom scan and choose the affected drive. You can also use Scan with Microsoft Defender where available.
5. Start the scan and wait for Windows Security to complete it. If any threats are found, follow the recommended actions to remove or quarantine them.

Keep in mind that removing malware won’t automatically repair file system damage that has already occurred. If the drive remains inaccessible after the scan, continue with the other troubleshooting methods below.

Method 3: Repair System Files

Windows system corruption is worth checking if several known-good external drives behave incorrectly, you’re experiencing other Windows errors, or the affected drive works normally on another computer. If only one external drive has the problem, the cause is more likely related to that drive or its connection.

Windows includes two built-in repair utilities: DISM and SFC. DISM repairs the Windows component image, while SFC checks protected system files and replaces damaged copies when possible.

Follow these steps:

1. Press Windows Key + S and type Terminal.
2. Right-click Terminal and select Run as administrator.
3. Enter the following command and press Enter: DISM.exe /Online /Cleanup-Image /RestoreHealth
4. Wait for DISM to complete the repair process.
5. Enter sfc /scannow and press Enter.
6. Wait for SFC to finish checking the protected Windows system files. If it finds damaged files that it can repair, it will replace them automatically.

Once both commands have finished, restart your computer, reconnect the external drive, and check whether you can access it normally.

Method 4: Fix the Hard Drive Using CHKDSK

CHKDSK is a built-in Windows utility for checking file-system metadata and repairing logical errors. It can help when “The parameter is incorrect” is caused by logical file system corruption. However, CHKDSK modifies file-system structures when repair parameters are used, so recover or back up important data before running it in repair mode.

We recommend starting with a check that doesn’t use the /f or /r repair parameters:

1. Press Windows Key + S and type Terminal.
2. Right-click Terminal and select Run as administrator.
3. Type chkdsk F: and press Enter. Replace F: with the actual drive letter of your external drive.
4. Wait for CHKDSK to check the volume and report its file system status.
5. If the drive remains stable, Windows recognizes its file system, and your important data has already been recovered or backed up, run chkdsk F: /f.
6. Wait for the process to finish, then reconnect the drive and check whether you can access it normally.

The /f parameter tells CHKDSK to repair logical file system errors it finds. You can also use /r, which includes the functionality of /f, checks for bad sectors, and attempts to recover readable information. However, /r performs substantially more reads, so it shouldn’t be the default command for every external drive problem.

CHKDSK can sometimes result in files becoming lost or inaccessible while it repairs damaged file-system structures. If this happens, check our separate guide on how to recover files deleted by CHKDSK.

Method 5: Update Drivers

Driver troubleshooting is worth trying if Device Manager reports a problem with the external drive, the same drive works normally on another computer, or Windows appears to have detected the device incorrectly. Reinstalling the device may help when Windows has a driver or device-enumeration problem.

Here’s how to check and reinstall the external drive in Device Manager:

1. Right-click Start and select Device Manager.
2. Expand Disk drives and locate your external drive.
3. Right-click the drive and select Properties.
4. Check Device status on the General tab. If Windows reports a problem with the device, note the error before continuing.
5. Close the Properties window, right-click the external drive again, and select Uninstall device.
6. Confirm the removal, disconnect the external drive, and then reconnect it. Windows should detect the device again and reinstall the appropriate driver.

If several USB devices are having similar problems, expand Universal Serial Bus controllers in Device Manager and check whether Windows reports errors there as well. You can also check Windows Update or your computer or USB/storage-controller manufacturer for a relevant driver update.

Method 6: Repair an External Hard Drive File System

TestDisk can help when “The parameter is incorrect” is related to damaged partition information rather than a general problem with the external drive. It’s worth trying if an expected partition has disappeared, Disk Management shows its space as Unallocated, or the partition table has been damaged. TestDisk also includes tools for repairing certain NTFS boot-sector problems.

[Don’t treat TestDisk as a generic fix for every RAW volume. If the drive contains important files, recover them first whenever possible, and don’t write any changes to the partition table until you have confirmed that TestDisk found the correct partition.

If the expected partition is missing, follow these steps:

1. Download and extract TestDisk, then run testdisk_win as administrator.
2. Select Create and press Enter to create a new log file.
3. Select the affected physical disk, highlight Proceed, and press Enter.
4. Allow TestDisk to detect the partition-table type. Verify that the detected type matches the physical disk before continuing. Windows 11 doesn’t determine whether a disk uses MBR or GPT, so don’t select a partition-table type based on the Windows version.
5. Select Analyse and press Enter.
6. Select Quick Search to search for lost partitions.
7. Inspect the partitions TestDisk finds. Highlight a possible lost partition and use the option to list its files. Confirm that you can see the folders and files you expect before making any changes.
8. If Quick Search doesn’t find the correct partition, return to the previous screen and run Deeper Search.
9. Review the results again and verify the expected files. Don’t universally change a found partition to Primary or another partition type unless you know that this matches the original disk layout.
10. Write the recovered partition information only after you have positively identified the expected partition and confirmed that its contents are correct.

TestDisk can also help with a damaged NTFS boot sector. Its NTFS repair options can compare the primary boot sector with its backup, restore the primary boot sector from a valid backup copy, or rebuild an NTFS boot sector in appropriate cases. These options should only be used when you have identified an NTFS boot-sector problem rather than simply because the volume appears as RAW.

If you haven’t used TestDisk before, check our detailed TestDisk review for a closer look at how its recovery and repair tools work.

Method 7. Format an External Hard Drive

If the data is already secured and logical file-system damage remains, formatting can recreate the volume’s file system and make it usable again. However, formatting removes the existing file-system structures and should be treated as destructive. Only proceed if your important files have already been recovered or backed up, the drive is physically stable, and Windows reports its correct capacity.

Here’s how you can format the affected volume using Disk Management:

1. Right-click Start and select Disk Management.
2. Locate the affected volume. Double-check its capacity and disk number to make sure you’ve selected the correct one.
3. Right-click the volume and select Format.
4. Choose the appropriate file system for how you plan to use the drive.
5. Leave the Allocation unit size at its default value unless you have a specific reason to change it.
6. Select Perform a quick format if the storage device is healthy.
7. Confirm the format only after you’ve secured all important files from the volume.

Method 8: Contact Data Recovery Service

Professional recovery is appropriate when the drive shows physical failure or the data is too valuable to risk further DIY attempts. Consider contacting a data recovery service if the drive clicks, repeatedly disconnects, freezes Windows when you try to read it, produces severe I/O errors, shows 0 bytes or No Media, reports an obviously incorrect capacity, or repeatedly fails while you try to create an image. The same applies if the drive has suffered physical or electrical damage.

If you suspect hardware failure, don’t repeatedly run CHKDSK, format or initialize the drive, or keep reconnecting an unstable device to see if it starts working. These actions won’t address the underlying hardware problem and can put additional stress on the drive.

A professional service can use specialized hardware and controlled recovery procedures when ordinary software cannot safely access the device. Before sending your drive to a recovery service:

• Contact the company and describe the problem, drive specifications, and symptoms you’ve encountered.
• Ask whether there are any evaluation fees and check the shipping requirements.
• Find out how pricing is determined and when you’ll receive a quote for the recovery.
• Check whether the service has a no-data/no-fee policy and whether any other charges still apply if the recovery is unsuccessful.