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Summary :

In this article, you will find the reason of the issue the parameter is incorrect as well as find solutions to fix the paramater is incorrect issue. in addition, this post will introduce how to recover data with the professioanl data recovery software - MiniTool Power Data Recovery. 

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Last week, I tried to access my precious photos stored on my hard drive, but I failed and got a warning message that saying "D:\ is not accessible, the parameter is incorrect".

D is not accessible Parameter is incorrect

In this situation, what should I do? How Do I fix the "The parameter is incorrect" error without data loss?

After that, to solve this error effectively, I read lots of information and consulted many experts. Now, in today's post, I am going to show you how to solve this issue effectively.

Error - Cannot Copy File: The Parameter Is Incorrect

As we know, sometimes, we would like to transfer files from USB to computer or vice versa. However, some users probably fail to copy files, and they receive some error messages like: "Error Copying File or Folder. The parameter is incorrect" or "Cannot copy file: The parameter is incorrect". (Picture below)

Cannot Copy file

At this time, what should we do?

Now, you can read this post How to Fix The Parameter Is Incorrect Copying Files Issue in Windows 10 to know how to fix parameter is incorrect error with ease.

Note: Since this post introduces lots of information about this error, here we don't need to spend much time talking too much about it. And next, we want to show another situation where we may encounter the parameter is incorrect error.

Error - Drive Is Not Accessible. The Parameter Is Incorrect.

Here, let's start with a true example.

Hi guys,
I got an internal hard disk. I bought a SATA Hard disk Enclosure in order to use as external. The hard disk was detected but when I am going to open the particular drive, it takes quite a while and prompts an error message "G:\ is not accessible. The parameter is incorrect / Data error (cyclic redundancy check)…" There is no "run as administrator" option when I right clicked it also. I tried running the chkdsk in administrator command prompt and this is the result I got.answers.microsoft.com

is not accessibleThe parameter is incorrect Data error

Have you ever encountered the same situation? Do you know how to deal with this error without losing data stored on this drive? If you still don't know how to deal with this problem effectively, you can keep reading to find solutions.

Data Recovery – Drive Is Not Accessible. The Parameter Is Incorrect.

When encountering the error "drive not accessible, the parameter is incorrect", experienced users will firstly think of recovering data and files from this drive, and then fix this error.

Now, you might be wondering:

"How to effectively recover data from drive whose parameter is incorrect?"

Well, MiniTool Power Data Recovery, a piece of simple and professional data recovery software developed by MiniTool Solution Ltd., is recommended here, for this tool can easily and quickly recover data from inaccessible drive including RAW, corrupted, damaged or unallocated drive.

This tool supports Windows 7/8/10 and other operating systems, and supports many storage devices including hard drive, external hard drive, USB flash drive. Besides, it is a read–only tool, thus users can use it to get lost data back without affecting the original data.

What's more, it not only offers wizard-based operation but also provides simple interface. Therefore, even a new user can easily handle this tool to restore lost data.

Free Download

Next, let's analyze the details. (Here, we take Windows10 for example.)

Tutorial: 3 steps to recover lost data from incorrect parameter drive Windows 10.


Step 1: launch MiniTool Power Data Recovery to get its main interface.

You can see This PC recovery module is selected by default, and all found partitions as well as their basic information including the volume label, the type of file system, the capacity, and so on.

this pc

Step 2: now, you need to select the target device which prompts "the parameter is incorrect", and then tap Scan button to scan it.

Note: While scanning, you can preview the found files. If you have find all needed files, you can stop the scanning process by clicking the Stop button. However, for the best recovery result, it is recommended to wait until full scan finishes, as shown below.

stop scanning

Step 3: check all needed files, and then tap Save button which is located at the lower right corner to store them. Note: never store selected files to the drive where you lost your data.

save files

Right here, you can directly click the following button to get the personal edition of MiniTool Power Data Recovery to break the limitation.

I used MiniTool Power Data Recovery to effectively recover lost data from drive which prompts"…is not accessible. The parameter is incorrect.Click to tweet


With MiniTool Power Data Recovery, we can easily and quickly recover data from inaccessible drive whose parameter is incorrect without damaging the original data.

Tip: In general, in addition to the "the parameter is incorrect" error, other errors will also cause hard drive not accessible. Here, you might be interested in this post: How to Fix External Hard Drive Not Recognized? Here Are 6 Solutions.

After recovering data, let's see how to fix the parameter is incorrect error.

How Do I Fix The Parameter Is Incorrect

Now, before fixing the error "Drive is not accessible. The parameter is incorrect", I want to introduce what caused this to happen at first. Knowing the exact reason, we can solve the problem with ease.

Cause of the error message "Drive is not accessible. The parameter is incorrect"

In general, various reasons can cause this error, including:

Pull out removable devices in an improper way: Some users including me may directly pull out our USB drive or other storage devices without ejecting. Force removal of drive may do harm to or even destroy boot records of partition, thus we cannot access its data and receive the "…parameter is incorrect" error.

USB port problem: The USB port is the bridge which connects the removable drive like USB flash drive to computer, once it gets problem then the removable drive may get damaged at the same time. Thus, this drive cannot be opened and reports some errors like "…is not accessible. The parameter is incorrect".

Bad sectors on the hard drive: As we all know, even one bad sector can make entire hard drive inaccessible.

Power failure for powered hard drive: Power failure also is one of the reasons which cause the hard drive inaccessible or unreadable.

Virus attack: Virus infection or malware attack can also cause "the parameter is incorrect" error.

File system goes wrong, such as DBR, MFT, FAT: In many cases, the error "Drive is not accessible. The parameter is incorrect" is caused by file system corruption.

In computing, a file system is used to control how data is stored and retrieved. Once file system goes wrong, you may fail to access drive and receive some errors like "…the parameter is incorrect", "Data error (cyclic redundancy check)…", "Windows was unable to complete the format", etc.

Tip: Do you know what cyclic redundancy check error is? Want to know the secret of how to effectively solve the "data error (cyclic redundancy check)" issue? Now, this post How to Fix Data Error (Cyclic Redundancy Check)! Look Here! will tell you something you want to know.

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After knowing the reasons, let's talk about how to fix the parameter is incorrect.

2 Solutions - The Parameter Is Incorrect

Solution 1: formatting the inaccessible drive

According to a survey, we find many users who encounter the error "Drive is not accessible. The parameter is incorrect" will try to format this drive to use it again.

Warning: Formatting will destroy all original data on this drive. Thus, you had better turn to MiniTool Power Data Recovery to recover lost data before formatting.

However, how to format this drive effectively?

When it comes to talking about hard drive formatting, we want to share another MiniTool's excellent product, MiniTool Partition Wizard, with you. As long as you turn to the professional freeware, you can easily format partition to fix some file system errors.

First, launch MiniTool Partition Wizard, then select the partition which needs formatting and choose Format Partition from the left panel or choose Format from toolbar, and enter new partition label and choose desired file system and cluster size.

In general, default cluster size is recommended for Partition Wizard will work out proper cluster size according to partition size.


Finally, click Apply to execute all changes.

As we know, if the error message "Drive is not accessible. The parameter is incorrect" is caused by corrupted file system, we can format this drive to fix it. However, what if the inaccessible drive is caused by bad sectors? In this situation, you can try the following solution.

Solution 2: run chkdsk f/r

If the "the parameter is incorrect" error is caused by bad sectors, lost clusters, cross-linked files, file system errors and directory error, you can run chkdsk to fix it. Detailed steps are shown below.

First, tap Startmenu, clickAll Programs and then chooseAccessories. After that, right-click theCommand Promptand choose Run as administrator.

Note: If you are prompted for entering administrator or for a confirmation, then type in the password, or click Allow. Here, you can read this post How to Open the Command Prompt in Windows to know more solutions to access Command Prompt.

Then, type command line "chkdsk /f/r X:" (X is the drive letter of the inaccessible partition) and hit Enter key. Here, for example, since my I drive prompts "I:\ is not accessible. The parameter is incorrect", I type "chkdsk /f /r i:" as shown below.


Finally, type exit and press Enter to exit it.

Tip: In some cases, the operation can't be completed under system, and you need to do this in safe mode or PE environment.
Warning: If bad sectors are found on the drive during the process and chkdsk will try to repair them. In that case, data stored on the drive with bad sectors will be lost. Therefore, you had better recover lost data before running these commands. And, MiniTool Power Data Recovery is recommended here, for it has excellent performance, high security and simple operation.

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Bottom Line

After seeing the above introduction, I guess you might have a basic understanding of how to deal with "drive not accessible, the parameter is incorrect" error without damaging the original data stored on this drive. To be specific:

First, turn to MiniTool Power Data Recovery to recover data from the inaccessible drive.
Second, formatting this drive or running chkdsk to fix the "the parameter is incorrect" error.

After reading the whole page, if you have any questions or any doubts about MiniTool Power Data Recovery, you can leave it in the following comments or directly send email to [email protected].

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