Description of the problem:
it is unavailable described structure of the disk file system is damaged. If the data is not important in peacetime, it can be directly formatted can use it. But sometimes there's data is important, then we must first restore the data re-formatting. Specific recovery methods can be seen to understand the text (not formatted recovery method) 
Tools / Software: Ultimate data recovery software
Step 1: After the first Baidu search for and download the program is running, double-click the need to restore the partition. 
Step 2: The program will soon be found files into the directory you want to restore the disk of the same name in 
Step 3: data will need to restore the hook option, then click the save the upper right corner of the "save as" button to copy the files checked out. 
Step 4: The final step will only need to wait for data copy program can be completed. 
Note 1: The location is unavailable recovered data temporarily saved to the other tray.
Note 2: If you want to restore removable disk location is unavailable to note, you must first restore the data re-formatting.