My WD External hard drive not recognised

Please HELP !!!

My 1 TB WD HDD is not working … When I plugged it to my PC the light comes on and the it starts spinning and the security window pops up and asks for password (it is locked) and when I give the password it takes time and slow down the PC and all programs stuck, during this time a hard drive icon shows in my computer named (Local Disk K) with a question mark after 5 or 6 minutes the icon disappear and the security window shows again (it repeats if I give the password for second time).

At disk management, my hdd is shown Unknown, Not Initialized and unallocated with black label and it doesn’t come online nor initialized. 

I don’t remember if I dropped it or stepped up on it. 

Somebody please help !!! What should I do to get it work ? If I format it would I be able to fully recover the data stored in it?

Thank you.