How to fix external hard drive not accessible in Windows 10/8/7/XP?

I could not access/open my Western 1TB external hard drive. This pop-up would say "External hard drive is not accessible. Access is denied." how do I fix external hard drive not accessible problem and get my data back?

The reason why you cannot access the hard drive or external hard drive may due to virus attack, power failure, improper operation, corrupt file system, physical damage, etc. These causes could result in several problems that cannot access the hard drive or external hard drive, like "Drive not accessible, the parameters is incorrect", "Drive not accessible, the file or directory is corrupted and unreadable", "Drive not accessible, the disk structure is corrupted and unreadable", "Drive not accessible, data error (cyclic redundancy check)", "Drive not accessible, access is denied".

When encountering this problem, how to fix "External hard drive not accessible" in Winodws 10/8/7/XP? In this article, we are going to fix external hard drive not accessible problem due to different reasons.

Fix "External hard drive not accessible, the parameters is incorrect" in Winodws 10/8/7/XP

Some people feel puzzled by the message "Drive not accessible, the parameters is incorrect" when trying to access the partition, hard disk or external hard drive. The causes to this problem could be virus attack, bad sectors, remove hard disk improperly, and other problems.

There are three ways to fix "External hard drive not accessible, the parameters is incorrect" in Winodws 10/8/7/XP:

1. Fix "External hard drive not accessible" with chkdsk command.

2. Fix "External hard drive not accessible, the parameters is incorrect" with RAW Drive Recovery module built-in M3 Data Recovery.

3. Recover data from inaccessible external hard drive with M3 Data Recovery and then format inaccessible external hard drive after data recovery is successfully done.

For details, please refer to: How to fix " Drive not accessible, the parameters is incorrect"?

Fix "External hard drive not accessible, data error (cyclic redundancy check)" in Winodws 10/8/7/XP

Data error (cyclic redundancy check) indicates that the operating system has found a drive with bad sectors, this is usually caused by hard drive hardware problems.

No program can repair bad sectors without losing data, so the only way is to recover data from this inaccessible external hard drive with a professional data recovery software, such as M3 Data Recovery.

For details, please refer to: How to fix "Drive not accessible, data error (cyclic redundancy check)"?

Fix "External hard drive not accessible, the file or directory is corrupted and unreadable" in Winodws 10/8/7/XP

M3 Data Recovery provides RAW Drive Recovery module to fix "external hard drive not accessible" and Data Recovery module to recover data from inaccessible external hard drive under Windows 10/8/7/Vista/XP and Windows Server 2012/2008/2003.

For details, please refer to: How to fix "Drive not accessible, the file or directory is corrupted and unreadable"?

Fix "External hard drive not accessible, the disk structure is corrupted and unreadable" in Winodws 10/8/7/XP

M3 Data Recovery provides RAW Drive Recovery module to fix "external hard drive not accessible" and Data Recovery module to recover data from inaccessible external hard drive under Windows 10/8/7/Vista/XP and Windows Server 2012/2008/2003.

For details, please refer to: How to fix "Drive not accessible, the disk structure is corrupted and unreadable"?

Fix "External hard drive not accessible, access is denied" in Winodws 10/8/7/XP

"External hard drive not accessible, access is denied" is caused by access permissions. It implies that you don't have the permissions to access the external hard drive; you have to take ownership to get permissions:

Right click the inaccessible partition, select "Properties".

Go to the Security tab, hit "Advanced".

Then click "Edit".

On the Owner tab, modify the ownership of the specified account.

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