What software can I use to manage an external hard drive thats broken?

Hi, I have an external hard drive and its broke (some of the sectors on it are bad), I want to send it away for repair/replacement but I want to ensure its complely blank before I do. I’ve tried using the software provided to ‘write 0’s’ to it but it always fails, and i cant initialize or format the drive cos they both fail too. Is there any software that could help? Thanks

Don’t waste your time trying to repair it. Smash it with a hammer and dispose of it yourself if you are that concerned about privacy. Time to get a new drive all together!