RAW drive

Hello, I hope someone can help me.
I do not know what has happened, but from one day to the other I was not able to access my "WD MyPassport" drive. After a lot of tries I figure out that the drive is now in RAW mode. I was able to retrieve some of my data from the drive but not the hierarchy of the drive.
What can I do to revive my drive?
Any help would be greatly appreciated!!!
 
Thank you JeromeFree for your help.
You ask if I have "smart IT master" I am not sure what that is, so I have to say no.
Regarding the tools, could you suggest some of them? I really don't want to lose the various directories and subdirectories I have created on my drive.
Any help would greatly APPRECIATED