Hard disk not recognized disk data recovery

Case:
Mr. Wang bought a mobile hard disk in March. He lent it to friends some time ago. After taking it back, he found that inserting it on the computer to show the unspecked USB device.The data inside is gone.

Solution:
Mr. Wang searched online and found a few data recovery companies. After comparison, Mr. Wang chose the data recovery company.After coming to the company, the engineer asked the engineer to help test the problem where the problem was.Through the engineer carefully testing, the cause of the failure was found, and a large number of bad disks appeared in the hard disk, which eventually caused the hard disk to not recognize it.Engineers make full mirrors on the fault disk, find data in the mirror disk, calculate the data manually, repair the data, extract data, and return to success.