How to fix External Hard Drive not Accessible/Corrupted/Unreadable?

Posted by Molly to Data Recovery on September 13th, 2018

Tried to open an external hard drive but only got the error message "H:\ is not accessible. The file or directory is corrupted and unreadable."? Follow the tutorial here to recover data from the inaccessible external hard drive with free data recovery software below, and then fix this issue without data loss.

"Location is not available. H:\ is not accessible. The file or directory is corrupted and unreadable." is a common error occurs on external hard drives, USB drives, Pen drives, SD/memory cards and much more. This error prevents you from accessing the files stored on the drive. In this article, we will show you why this error occurs, and how to fix an external hard drive that is corrupted, inaccessible and unreadable without losing data.

External hard drive not accessible corrupted unreadable

How to fix an external hard drive that is not accessible, corrupted and unreadable without data loss?

Method 1: Run CHKDSK to fix the inaccessible, corrupted, and unreadable external hard drive.

Generally, when an external storage device, such as an external hard drive, a USB drive, a Pen drive, an SD/memory card, etc., is not accessible, corrupted or unreadable on Windows, you can try to fix a corrupted drive using cmd without data loss.

Step 1: Type "cmd" into the search box from Start. From the search results, right-click on Command Prompt and select Run as Administrtor.

Step 2: Enter "chkdsk /r *:" in the pop-up window and press "Enter". For example, if the inaccessible USB drive is disk H, enter "chkdsk /r h:"

Step 3: Reboot your computer and see whether the "H:\ is not accessible. The file or directory is corrupted and unreadable." error has been fixed.

Method 2: Fix the inaccessible, corrupted, and unreadable external hard drive by reformatting.

As you may already know, reformatting will erase all the files stored on the external hard drive. So, before repairing the corrupted hard disk, you need to recover data from the inaccessible external hard drive drive with free external hard drive data recovery software.

iBoysoft Data Recovery is reliable data recovery software for Windows to recover data from formatted, inaccessible, corrupted, unreadable SD/memory cards, external hard drives, USB drives and other storage devices. It's also a professional RAW file system data recovery program that converts RAW to NTFS or converts RAW to FAT32 without losing data.

Step 1: Recover data from the inaccessible/corrupted/unreadable exterbal hard drive with iBoysoft Data Recovery.

1. Free download iBoysoft Data Recovery and install it.

2. Launch iBoysoft Data Recovery.

Recover data from inaccessible corrupted unreadable drive with iBoysoft Data Recovery

3. Select the inaccessible external hard drive and click "Next" to start scanning for all lost files.

4. Select the files you want to get back and then click "Recover".

After recovering data from the inaccessible/corrupted/unreadable exterbal hard drive, you can go ahead to reformat it.

Step 2: Reformat the inaccessible/corrupted/unreadable exterbal hard drive.

1. Go to Disk Management.

2. Right-click on the inaccessible external hard drive and select Format.

3. Setup the required information and click Start. The process will finish in minutes.

In this way, you can get rid of the error message: "H:\ is not accessible. The file or directory is corrupted and unreadable." on external hard drive and restore the external hard drive back into a usable state without data loss.

External hard drive "is not accessible. The file or directory is corrupted and unreadable." Why?

Whenever you get the error: "H:\ is not accessible. The file or directory is corrupted and unreadable.", you should firstly consider there might be some form of file system corruption or damage to the external hard drive. Usually, it could be:

1. Corrupted Master File Table. This is mainly due to improper operations such as ejecting the external hard drive without using "Safely Remove Hardware" option, and unexpected power failure, etc.
2. Virus infection or malware attacks.

Besides, you should also consider physical damages oo the external hard drive, which will also make it not accessible, corrupted and unreadable on computer. If this is the case, you need to send it to an expert for reparation.

Still have questions?