"USB drive not accessible on Windows 10" is one of the most common issues that most of us have ever encountered. It's annoying as once the USB drive becomes inaccessible, you'll have no chance to read or edit the files on it. But the good news is that the inaccessibility of the USB drive doesn't necessarily mean the loss of data.
In this article, we will show you why USB drives become inaccessible on Windows 10/8/7, and also how to fix USB drive not accessible error in different ways.
How to fix USB drive is not accessible error on Windows 10 without data loss?
Most of the time, the USB drive becomes inaccessible on Windows 10 is due to RAW file system or corruption. You can fix a corrupted USB drive using cmd command or convert RAW to NTFS on Windows 10. However, the most reliable way is to recover lost data from the USB drive, then fix the error without worrying about data loss.
Method 1: Recover lost data from the inaccessible USB drive.
If the USB drive is not accessible, so does the data stored on it. Thus, you need to recover lost data from inaccessible USB drive with USB data recovery software.
iBoysoft Data Recovery is reliable data recovery software for Windows platforms that's able to recover lost data from formatted, unreadable, inaccessible external hard drives, USB drives, SD cards, memory cards and more 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-by-step guide to recover lost data from inaccessible USB drive with iBoysoft Data Recovery.
Step 1: Free download iBoysoft Data Recovery and install it on Windows 10.
Step 2: Launch iBoysoft Data Recovery.
Step 3: Select the inaccessible USB drive and click "Next" to start scanning for all lost files.
Step 4: Select the files you want to get back and then click "Recover".
After recovering data from the inaccessible USB drive, you can go ahead to reformat it. Also, you can try to access the USB drive with the following methods without worrying about data loss.
Method 2: Modify the Ownership of the inaccessible USB drive.
Usually, the USB drive not accessible on Windows 10 error is due to the missing of authority to the drive. To access the USB drive, you need to take the ownership of the USB drive in these steps.
Step 1: Right-click on the inaccessible USB drive and choose Properties.
Step 2: Select the Security Tab.
Step 3: Under Group or user names, choose your account name to check if you have the permission to access the USB drive.
If you don't have the permission to access the USB drive, go to next method.
Method 3: Add Authenticated User to the inaccessible USB drive.
Step 1: Follow the steps as above and go to the Security Tab.
Step 2: Click on Edit. The Permissions box will appear.
Step 3: Click on Add button to continue.
Step 4: Add a new user named "Authenticated User" and click on OK.
Step 5: Tick the Allow box after "Full control" option.
Step 6: Click on Apply then OK.
Method 4: Check USB drive error.
Option 1: Go to Properties > Tools > Check Now.
Option 2: Run chkdsk /r.
Step 1: Type "cmd" into the search box from Start menu and press "Enter".
Step 2: Enter "chkdsk /r *:" in the pop-up window and press "Enter". For example, if the inaccessible USB drive is disk G, enter "chkdsk /r g:"
Step 3: Reboot your Windows 10 computer and try to access the USB drive.
Hopefully, you can fix the USB drive not accessible on Windows 10 error and access data seamlessly through the methods. If still failed, this inaccessible USB drive may be physically damaged and you need to send it to a local reparation service.
Read more: Why a USB drive is not accessible on Windows 10?
Before fixing the error, let's take a look at the possible reasons why a USB drive becomes inaccessible on Windows 10/8/7 or earlier Windows operating systems.
1. A USB drive is ejected or unplugged improperly.
2. File system corrupted. Specifically, that's DBR, MFT file corruption.
3. Sudden power failure happened.
4. Virus infection or malware attacks.
5. Physical damage to the USB drive.