Repair my external hard drive?

"You’re going to need to bring this to a data recovery professional, its the only way to recover the data safely. Unfortunately, they cost a large amount of money.

I cannot stress how important it is to keep important data backed up on a separate drive for reasons like this. You never know when something can go wrong. Also, SSDs and flash storage are much more reliable so I recommend you use that from now on.

Good luck to you, and I hope you get your data back."