One and basic of hardisk error is a disk error or not formatted such OS say. Some and always a victim of this problem is our USB drives or any portable drives that can connect through usb or firewire.
The easy fix on this problem is simple just format it, but not easy if you have a valuable data stored on the disk. That’s why handle this is caution to anyone owner of the disk.
On the day I encounter this, I searched all over the web to find a free or low cost tool to made this problem eased. I drop all the softwares and traditional way (like put in the fridge) .
This software I found is user friendly to operate and the most important is to safe your data when the operation is done.
The HDD regenerator is easy and effective way to fix bad sectors without losing your existing data..