How to Fix a Corrupted SD Card and Recover Your Files

TL;DR

To fix a corrupted SD card: Stop using it immediately → Recover files first → Then repair the card. Never format until you've recovered your data. Free tools like PhotoRec and TestDisk can recover files from corrupted cards.

⚠️ Important: Read This First

Stop using the SD card immediately. Every write operation risks overwriting your files. Don't format, don't take new photos, don't save anything.

Step 1: Diagnose the Problem

Step 2: Check Physical Connections

Before assuming the card is corrupted:

1. Try a different card reader — Built-in laptop readers often fail
2. Try a different USB port — Use a powered port, not a hub
3. Try a different computer — Rules out driver issues
4. Check for write protection — Some cards have a physical lock switch

If the card works on another computer, the issue is with your system, not the card.

Step 3: Recover Your Files First

Never format a corrupted SD card until you've recovered your files.

Option A: Windows File Recovery (Free)

Windows 10/11 includes a built-in recovery tool:

winfr E: D:\Recovered /regular

Replace E: with your SD card letter and D:\Recovered with your output folder.

Option B: PhotoRec (Free, Open Source)

1. Download PhotoRec
2. Run as administrator
3. Select your SD card
4. Choose file system type (usually FAT/NTFS)
5. Select destination folder (NOT on the SD card)
6. Wait for recovery to complete

Success rate: 70-90% for typical corruption

Option C: Recuva (Free)

1. Download Recuva
2. Run and select "In a specific location" → your SD card
3. Enable "Deep Scan" for better results
4. Recover files to a different drive

Always recover to a different drive — never save recovered files back to the corrupted SD card.

Step 4: Repair the SD Card

Once your files are safely recovered, you can fix the card:

Method A: Windows Error Checking

1. Open File Explorer
2. Right-click the SD card → Properties
3. Tools tab → Check → Scan and repair

Method B: CHKDSK (Command Line)

chkdsk E: /f

Replace E: with your SD card letter. The /f flag fixes file system errors.

Method C: Format (Last Resort)

Only format after recovering your files:

1. Right-click the SD card in File Explorer
2. Select Format
3. Choose:
   • File system: exFAT for cards >32GB, FAT32 for smaller
   • Allocation unit size: Default
   • Quick format: Uncheck for thorough format
4. Click Start

Step 5: Repair Recovered Video Files

If your videos were recovered but won't play, they need repair:

Use VidRepair to fix corrupted video files recovered from SD cards:

1. Download VidRepair from vidrepair.com
2. Select the recovered video file
3. Add a reference file from the same camera if available
4. Click Repair

Why this works: SD card corruption often damages the video container (metadata), not the actual video data. VidRepair reconstructs this metadata.

When SD Cards Can't Be Fixed

Preventing SD Card Corruption

- Eject properly — Always use "Safely Remove Hardware"

• Don't fill completely — Leave 10-20% free space
• Use quality cards — SanDisk, Samsung, Lexar, Kingston
• Replace old cards — SD cards wear out after ~10,000 write cycles
• Avoid extreme temperatures — Heat kills flash memory
• Don't remove during writes — Wait for camera to finish saving

SD Card Health Check

To check if your SD card is failing:

# Check for bad sectors (Windows)
chkdsk E: /r

The /r flag locates bad sectors and recovers readable data.

Related Articles

• Fix Corrupted Video Files — Repair recovered videos
• GoPro SD Card Recovery — Camera-specific guide
• How Video Files Get Corrupted — Understand causes