My exturnal hdd not working properly. Do not open & close properly. so what's the reason&problem of my hdd.
Try to run chkdsk.
Open the "Computer" window
Right-click on the drive in question
Select the "Tools" tab
In the Error-checking area, click <Check Now>.http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/using-windows-7-how-do-i-run-chkdsk/a68b3e4d-1a42-e011-9767-d8d385dcbb12