WD Smartware not detected

When I insert my WD protable drive, it says that I need to format the disk before use. Does it mean that the data is corrupt and cannot be retrieved or is there an option to retrieve the data somehow?

I have tried inserting in different USB ports as well; but the error message is consistent.

Is the HDD completely useless or can it still be used after formatting the drive?

Any help is appreciated.

If asking to be reformatted then data is corrupted, you still might be able to retrieve the data with a software . 

The drive might still work once you reformat.