'%3e%3cpath%20d='M8%200C12.4183%200%2016%203.58172%2016%208C16%2012.4183%2012.4183%2016%208%2016C3.58172%2016%200%2012.4183%200%208C0%203.58172%203.58172%200%208%200ZM11.6162%204.38379C11.2257%203.99337%2010.5927%203.99338%2010.2021%204.38379L8%206.58594L5.79785%204.38379C5.40732%203.99334%204.77429%203.99329%204.38379%204.38379C3.99331%204.77429%203.99335%205.40733%204.38379%205.79785L6.58594%208L4.38379%2010.2021C3.99348%2010.5927%203.99341%2011.2257%204.38379%2011.6162C4.77426%2012.0066%205.40734%2012.0065%205.79785%2011.6162L8%209.41406L10.2021%2011.6162C10.5927%2012.0066%2011.2257%2012.0067%2011.6162%2011.6162C12.0067%2011.2257%2012.0066%2010.5927%2011.6162%2010.2021L9.41406%208L11.6162%205.79785C12.0066%205.40735%2012.0066%204.77429%2011.6162%204.38379Z'%20fill='%23080E17'%20fill-opacity='0.46'/%3e%3c/g%3e%3cdefs%3e%3cclipPath%20id='clip0_3761_713'%3e%3crect%20width='16'%20height='16'%20fill='white'/%3e%3c/clipPath%3e%3c/defs%3e%3c/svg%3e)
How to Repair Corrupted PDF Files Recovered from a Formatted USB
Question details
The user is unable to open PDF files that were retrieved from a formatted USB drive using third-party data recovery software because the files are corrupted.
- Product
- PDF Files
- Device & OS
- not provided
- Scenario
- Attempting to view PDF documents after performing data recovery on a formatted USB flash drive.
- Observed behavior
- The recovered PDF files are recognized as corrupted by PDF readers and cannot be opened or viewed.
Immediately stop writing new data or installing recovery software on the formatted USB drive to prevent overwriting the original file sectors.
Use a Different Data Recovery Tool with Deep Scan
Since the initial recovery software failed to reconstruct the files properly, a professional tool with a deep scan algorithm might successfully reassemble the fragmented PDF data.
When a USB drive is formatted, the file system index is wiped. If files were fragmented, standard recovery software might stitch the wrong data blocks together, resulting in a corrupted PDF. A deep scan bypasses the file system and looks for specific PDF file signatures (headers and footers) directly on the drive sectors.
Download and install a highly-rated professional data recovery program on your computer's main hard drive, not on the affected USB drive.
Connect the USB drive, open the recovery software, and select the 'Deep Scan' or 'Raw Recovery' option targeting the USB drive.
Set the scan filter to look specifically for PDF documents (.pdf) to narrow down the search and improve accuracy.
Once the scan is complete, attempt to preview the PDFs in the software. If they display correctly, recover them to a folder on your computer's local drive.
Restore PDF Files from Cloud or Local Backups
Repairing severely corrupted files from a formatted drive is often impossible. Restoring from a backup is the most reliable solution.
Attempt Repair with Specialized PDF Utilities
If the PDF was recovered but has a slightly damaged file header, a dedicated PDF repair utility may be able to rebuild the structure.
Open and Protect Your PDFs with WPS Office
Once you have successfully recovered your files, use WPS Office to read, manage, and safeguard your PDF documents. With built-in cloud synchronization, WPS Office helps you automatically back up your files to prevent permanent data loss in the future.
- 1. Download and Install: Download and install WPS Office on your PC or Mac.
- 2. Open the Recovered File: Launch WPS Office, select the 'PDF' tab on the home screen, and open your successfully recovered PDF document.
- 3. Enable Auto-Backup: Sign in to your WPS account and enable the 'Cloud Backup' feature to automatically sync your documents.
- 4. Manage Your Files: Use the built-in PDF tools to add annotations, edit text, or convert the file to a Word document for easier content extraction.
Frequently Asked Questions
Why do PDF files become corrupted after being recovered from a formatted USB?
Formatting a USB drive clears the file system table that tells the computer where file fragments are located. Recovery software must guess how to piece the raw data blocks back together. If it stitches the wrong blocks together, the resulting file is structurally corrupted.
Can I fix the corrupted PDF by simply changing the file extension?
No. Changing the file extension only alters how the operating system identifies the file. It does not fix the underlying hexadecimal code, missing data blocks, or structural damage caused by improper recovery.
Can WPS Office open slightly corrupted PDF files?
WPS Office has a robust PDF reader that can sometimes bypass minor structural errors or missing cross-reference tables to display the readable portions of a PDF. However, if the file consists of completely incorrect data blocks due to a bad recovery, no reader will be able to open it.
Is it worth paying for a professional data recovery service for corrupted PDFs?
If the PDFs contain critical, irreplaceable information and deep-scan recovery software fails, a professional data recovery lab may use specialized hardware tools to extract raw memory data. This is typically expensive and should be considered a last resort when backups are unavailable.
