7-Zip Data Error Fix

Brithny updated on Sep 06, 2019 to Data Recovery Solution | How-to Articles


Calm down when you can't extract files from .7z archive by using 7-Zip. We've collected reliable solutions here to help you fix 7-Zip 'data error' and effectively recover lost .7z files with EaseUS data recovery software.

7-Zip data error shows up

As for the 7-Zip users, some of you may probably meet data error like this:

"I am having trouble extracting nearly all the files in a 7-zip file that I compressed several months ago.  When I try to extract the files, only 2 out of the 11 files are extracted and an error message pops up saying:
7-Zip: Diagnostic messages:
Data error in 'File Name.' The file is broken! How can I fix this data error and get the lost files back

7-Zip data error.

On this page, you'll find several fixes provided by 7-Zip official website and professional geeks online to effectively repair this error, restoring all valuable files with ease.

7-Zip data error fixes

It is indeed bothering when you have to face this kind of situation. Stay calm, read on and you can fix the '7-Zip data error' with provided solutions on this page.

Method 1. [Official] Fix for 'Data error' by replacing 'bad' .7z archive

According to 7-Zip website, when you receive "Data Error" it means that you almost can't recover the data. But if you have exact copies of files from the 'bad' archive, you can fix this error by doing so:

  • Step 1: Create a similar archive with good copies of files with the same settings, and in the same order.
  • Step 2: Replace "bad" parts of bad.7z with "good" parts from another good.7z,
  • Step 3: You must look listings of files in bad and good archives, logs of "test" command, and think about ways to replace bad parts.
  • Step 4: Mostly, you can directly replace the old .7z archive with the new good one, then you can retry the decompress the file again.

Method 2. Restart 7-Zip and reboot PC

According to some threads on some forums, some users who experienced the same issue on 7-Zip suggest that restarting 7-Zip software and rebooting PC may work and resolve this issue.

Method 3. Clear virus, redownload an extraction tool

Viruses infection is one of the top reasons that may cause the 7-zip data error and many people are eager to know how to fix this error. 

  • First, use your antivirus software to clear the existing virus.

AVG antivirus, quick heal or Norton to scan your computer and get rid of the virus.

  • Second, go to 7-Zip official website to download the tool again. 

Before you download it, you must uninstall the old one. Remember to download the same version as the one when you used it to compress files.

In this way, you can try again to see whether the data error shows up or not.

Method 4. Try zip file repair tool

Mostly, when the zip archive files corrupted, a reliable zip file repair tool or software can help.

Therefore, you can also search "Zip repair tool" online, pick a reliable one for fixing this issue immediately.

Bonus Tip: 7-Zip data error recovery

If you lose or delete the zip archive file on your computer hard drive or external storage device, and want to recover the lost 7-Zip file, read on to find the solution.

Nothing becomes difficult with the help of EaseUS Data Recovery Wizard. This file recovery software supports to restore various types of files including the 7-Zip (.7z) files on Windows 10/8.1/8/7. 

You can easily recover the lost 7-zip file by following the three steps:

Step 1. Choose the file location to scan.

Run EaseUS Data Recovery Wizard on your computer. Choose the drive where you lost files and click "Scan". If you lost files were on an external storage device, connect it to your computer firstly.

select the file location and click scan

Step 2. Scan the lost files.

The software will start immediately a quick scan for deleted files, and later a deep scan will launch to scan more lost files all over the selected drive. After the scan, you can use the Filter to quickly filter a specific file type.

scan the lost files

Step 3. Preview and restore files.

Double-click on a file allows for a full preview. Finally, select the desired files, click "Recover" and browse a location to save all the files at once.

recover lost files

100% of people found this article helpful.


Frequently Asked Questions

1. Why choose EaseUS Data Recovery Wizard?

"EaseUS Data Recovery Wizard is the best we've seen. It's far from perfect, partly because today's advanced disk technology makes data-recovery more difficult than it was with the simpler technology of the past, but it's fast and efficient..."PCMag

"The first thing you'll notice about EaseUS Data Recovery Wizard Pro is that its interface is very clear and uncluttered, with only a small collection of self-explanatory controls. You won't find lots of extra options hidden in a system of hidden menus, either; what you see really is what you get."techradar

"Recover lost files, even after deleting a partition or formatting your drive."Macworld

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

About Data Recovery Wizard

It's super easy to recover 250+ types of files after deletion, disk formatting and virus infection. Click the links and compare the difference of each version.