Fix 'the device is not ready' on USB Flash Drive/HDD

Jean updated on Aug 12, 2019 to Storage Media Recovery | How-to Articles


Can you open HDD, external hard drive or USB flash drive due to the error "the device is not ready" in Windows 10, 8 or 7? Here, you can figure out the problem and quickly fix the "device is not ready" error. If you have very important documents or photos on the drive, download EaseUS hard drive recovery software to access and recover your data.

"After a major Windows 10 update, I found that I can't open USB flash drive as well as some other external hard drives. The error message is about 'the device is not ready'. But the hard drive's light is blinking, I can also see the drive letter in Disk Management. What should I do to access data and quickly fix the error?"

the device is not ready

How to fix "the device is not ready" error?

The "device is not ready" error may sound quite familiar to many of us. Do you know what it is and how to get rid of it? Here, we have compiled some typical reasons and solutions for you. You can check the symptoms and find the clue that leads to your hard drive or flash disk being due to the "device not ready" error.

1. The hard drive or storage devices shows 0 bytes.

2. Storage devices not accessible.

3. The device is not ready.

Both hardware and software issue could cause a Windows computer being unable to read your connected hard drive normally, though it is recognized and showing up in the computer. Do not worry when such an error occurs. Take the right steps to recover data and rectify the problem with ease.

# 1. Recover data from the inaccessible hard drive or flash disk

When a hard drive or USB stick is showing the "device is not ready" error, you can no longer access the hard drive data as usual. When this happens, do not hesitate to download EaseUS hard drive recovery software. It's the most qualified recovery software that supports to access hard drive without formatting and recover data.

Keep Noted: Please don't format or reset the hard drive once it becomes inaccessible. To restore important data from inaccessible hard drive should be your first mission. Here below is a detail hard drive data recovery guide for you to follow, try and get your lost data back.

Step 1. Run Software and select a location

  • Launch EaseUS Data Recovery Wizard on your computer.
  • Select the hard drive which becomes inaccessible on your PC.
  • Click Scan to let this program scan and find your hard drive data.
Run hard drive recovery software.

Step 2. Scan to Find Lost Data

EaseUS Data Recovery Wizard will full scan and find all your data on the inaccessible hard drive.

And, after the scanning, you can preview and check found files on the scanning result window now:

  • Deleted Files: browse to see all deleted files here.
  • Drive (with your drive name): all lost files are listed here.
  • Lost Partition Files: if you once deleted your hard drive partition or formatted it, check and find data here.
  • Extra Files: a quick access to your inaccessible data and raw files.
Scan to find all lost data.

Step 3. Restore Hard Drive Data

  • Finally, select the items you want to get back and click "Recover".
  • Choose a secure location (second hard drive partition on your PC or another external storage device).
  • And then click "OK" to start recovering all lost data from your inaccessible hard drive now.
Restore all lost data.

# 2. Re-install your device driver

On Windows 10, a common software problem is "the device driver is not installed, is corrupted or missing". Try to re-install the device driver and fix the "device is not ready" warning.

1) Go to Device Manager, right-click the name of your device, select Uninstall.
2) Keep your device connected. Restart the PC and Windows will attempt to re-install the driver.

# 3. Run disk check to fix hardware issues

Do not forget to perform a disk check to examine disk errors. The "device is not ready" error is very likely resulted from a file system errors or bad sectors on the drive, so let the Windows disk check utility to help.

1) Right-click on the drive which you wish to check and select Properties.
2) Click on the Tools tab. Under the Error checking, click on the Check button. This option will check the drive for file system errors.

Run Disk check to fix the device is not ready error
3) Follow the wizard to complete the disk error check and restart your computer to repair the errors that were found.


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Frequently Asked Questions

1. Why cannot I recover 2GB data for free?

It is recommended to check the version installed is Free or Trial because they are different versions.

Trial has data preview function but cannot save any files, while the Free version enables to recover 2 GB files. The default free space is 500 MB and you may share the product on social media to get another 1.5 GB.

2. Why cannot the recovered files be opened?

A file is saved as 2 parts on the storage device: directory info (which is comprised by file name, time stamp and size info, etc.) and data content.

If the files with original file names and folder structures cannot be opened, one possible reason is the corrupted directory info. There is still a chance to recover the data content with the RAW Recovery method in our software.

3. Why isn't it suggested to recover the files back to the original drive?

The storage structure of the lost files would be altered or damaged by any changes on the drive. If you save the recovered files back to the same drive, the original data structures and data content would be corrupted or overwritten, which causes permanent data loss. So you should prepare another disk to save the files.

4. How can I check whether my data is recoverable or not before purchase?

The Free version helps you save 2GB files to better verify the recovery quality of our product before purchase.

5. How long does it take to scan the drive?

It strongly depends on the capacity of your hard drive and the performance of your computer. As reference,most drive recoveries can be completed in around 10 to 12 hours for a 1-TB healthy hard drive in general conditions.

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