When you try to copy or move one or more files, Windows will display :
Error copying file or folder. Unable to copy ... : Data error (cyclic redundancy check).
This error simply means that the data is corrommpues. Code integrity checking (CRC or Cyclic Redundancy Check) of the destination file is different from the source file. This means that there was a problem when copying.
For more information:
A cyclic redundancy check or CRC (Cyclic Redundancy Check) is a means for detecting transmission errors by adding redundancy. Added redundancy commonly called (wrongly) checksum is obtained by a type of hash on the data set.
The CRC is calculated before and after the transmission or duplication, and then compared to ensure that they are the same. The most used CRC calculations are constructed so that certain types of errors, such as those due to interference in the transmission, always be detected.
Cyclic redundancy error = Corrupt data
In the case of a floppy, try to relax a little on to the dust from which could prevent reading. And try again.
In the case of a CD, DVD, Blu-ray, ... :
- Or it is damaged or scratched.
- Let protected against copying (Ex : CD games, business software or music CDs)
In the case of a hard disk :
- Try to copy the files elsewhere. The destination hard disk may be defective.
- If the above solution does not work, we recommend that you test your hard drive (the source and the destination) to try and repair bad sectors.
For this, see point 1 of our tutorial "Testing the Hardware".