Having a corrupted SD card can lead to a lot of problems and lost data. Thankfully, there are several things you can do to help prevent and check for SD card corruption.
What causes SD card corruption?
There are a few main causes of SD card corruption:
- Improperly removing the SD card from a device while it’s still writing data
- Power loss or unexpected shutdown while the card is being written to
- Physical damage to the card from drops, water, etc.
- Malware or viruses infecting the card
- Old age and general wear on the card after prolonged use
How can I prevent SD card corruption?
Follow these tips to help avoid SD card corruption:
- Safely eject the card before removing it from a device
- Avoid removing the card when it’s actively being written to
- Protect the card from physical damage by storing it carefully
- Regularly scan the card for malware and viruses
- Replace older cards that have seen a lot of use
- Use high-quality, name brand SD cards from reliable manufacturers
How can I check for SD card corruption?
Here are some ways to test an SD card for errors or corruption:
Try accessing files on the card
Put the card in your computer or device and try opening files that you know are supposed to be there. If you get errors opening the files, that could indicate corruption.
Look for error messages
Pay attention for any error messages from your computer or camera that mention not being able to read the card. This is one of the clearest signs of corruption.
Run the CHKDSK tool
On Windows, you can use the built-in CHKDSK disk checking tool to scan for file system errors and bad sectors.
Use Disk Utility on Mac
The Disk Utility app on Mac OS can validate and repair disk errors on SD cards and other storage devices.
Try data recovery software
Specialized data recovery programs may be able to read corrupted cards and recover their files. This can confirm if corruption exists.
Format the card
As a last resort, you can reformat the SD card, which will scan it for errors in the process. Any remaining data will be wiped, so only do this if you’ve exhausted other options.
What can I do if my SD card is corrupted?
If you’ve confirmed your SD card is corrupted, try these steps:
- Stop using the card immediately to prevent further data loss
- Try data recovery software to rescue any important files
- Back up whatever files you’re able to recover
- Check if the card is still under warranty and can be replaced
- Reformat the card to fix file system errors
- If reformatting doesn’t work, properly dispose of the damaged card
How can I recover data from a corrupted SD card?
If important files are on a corrupted SD card, try recovering them with:
Data recovery software
Programs like Recuva, Disk Drill, Stellar Photo Recovery, or EaseUS can scan the card and restore data that hasn’t been completely lost.
A local data recovery service
For severe corruption, professionals may be able to repair the card and recover data using specialized tools.
| Recovery Method | Pros | Cons |
|---|---|---|
| Data Recovery Software | Cheap, convenient for minor corruption, rescues recently deleted files | Limited for severe corruption, doesn’t repair physical card damage |
| Local Data Recovery Service | Recovers data from any type of damage, repairs SD cards | Expensive, time consuming, not a guaranteed success |
How can I avoid corruption on my new SD card?
When getting a new SD card, keep it working properly with:
Proper storage and handling
Keep the card protected in a case and be gentle with it to prevent physical damage.
High-quality card brands
Stick with reliable brands like SanDisk, Samsung, or Lexar for better reliability.
Regular scans
Occasionally scan new cards for errors using CHKDSK or Disk Utility.
Safe ejection
Always properly eject the card before removing it from devices.
Firmware updates
Keep devices like cameras updated to the latest firmware for best SD card support.
Conclusion
SD card corruption can happen, but is often preventable. Be mindful when handling cards, only buy quality brands, regularly scan for errors, safely eject before removing, and properly recover data if corruption occurs. Following best practices greatly reduces the risks of losing data due to a damaged SD card.
