Problem description:
The disc in the drive is not formatted, indicating that the file system structure of the disc is damaged. How to recover the data of the unformatted hard disk in the drive can be seen in the text (unformatted recovery method) 
tool / software: extreme data recovery software
Step 1: After Baidu search and download the software and open it, select the disk that needs to be restored, and then click the "Start Recovery" button 
Step 2: The software will quickly find the data found in the same directory as the volume name of the disk to be restored in 
step 3: to resume the check, and then save the upper right corner of the "save as" button to copy the files checked out. 
Step 4: Just wait for the program to copy the data. 
Note 1: The data recovered from the disc in the drive without formatting needs to be temporarily saved to other discs.
Note 2: If you want to restore the disc in the disk drive that has not been formatted, you need to pay attention to it. You must restore the data before formatting.