Windows reports “Data error (cyclic redundancy check)” when I try to copy files from an external HDD/USB or open certain files. I’m worried about data loss I haven’t run full repairs yet. Looking for safe recovery steps, recommended repair commands, and when to stop to avoid further damage.
How do I recover from a Data error (cyclic redundancy check) when copying files or accessing a drive?
- Thread starter lindamary
- Start date
You can try these steps safely:
Stop using the drive if it’s making strange noises to avoid further damage.
- Check the drive for errors – Open Command Prompt as admin and run:
<span><span>chkdsk X: /f /r<br></span></span>
(Replace X: with your drive letter.) - Try copying files to another drive – Sometimes you can salvage data even if some files are bad.
- Use data recovery software – Tools like Recuva or EaseUS can help recover files if the drive is failing.
Stop using the drive if it’s making strange noises to avoid further damage.