Recover Data from Damaged Harddisk

Whenever I connect my Hard-disk to laptop, my laptop slows down and am not able to open the hard-disk folder. Am not able to access my data in it. As soon as I disconnect the Hard disk, laptop gets back to normal. Can anyone please help with the issue ?
 
If it's physically damaged, nothing you can do it in your own. You need to consult it to a professional unless you have knowledge and experience on some DIY hard drive repair.
 
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