Repair external disk

[Guest]

Hello,
Good day,my hard drive suddenly refused to open or auto-run. instead it promts me to format it when i plg it to my system. i cannot afford to loose the information on the drive what shold i do to remedy the situation

 

[Ubrales]

Can you try this external drive on a different computer?

 

[FreeDataRecovery]

Does this see the lost partition? http://findandmount.com