It means your drive IS going to die soon.
Image it with a Non-Windows (i.e. DOS) based imager (e.g. Media Tools Pro) before it does!
Then, if the image goes perfectly you can just copy the data off the image. Or if the image struggles, you may have to use some recovery software to get your data back.
Better NOT to try and access with Windows, or it might die quicker than you think!
Hope this helps.
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