Hi there priya07,
You can try to run chkdsk (drive letter): /R in the Command Prompt. If the issue you are facing is some kind of file system error or some bad sectors this may able to fix it.
You could also check out the following link which shows how to do this through Windows Explorer: http://helpdeskgeek.com/how-to/run-chkdsk-utility-xp/
Hope this will help,
D_Know_WD