How to open a corrupted and unreadable drive and recover my files?

Hi hello can you help me on how to open and recover all my files in my drive... When i double click my drive G: an error will appear Can't open drive G: drive unreadable and corrupted.
I try use chkdsk G: /R Yes it works but all my FILES are lost. Can you help me on how to recover my FILES.. Can anyone can help me.. because i need those Files


This image shows an error when i double click my drive G.