My mistake has caused irreparable consequences. What should I do?

The thing to do now is not to blame yourself. Only remedy.

First, ask a professional data recovery company to try to recover the hard drive data to a certain time through professional technical means. Or some other way.

If you want to take responsibility, it doesn’t lie with you.

As a professional photographer, you must at least ensure that you have at least two backups. First of all, the photographer failed to fulfill his responsibility and gave himself the opportunity to "make" mistakes. Your sense of responsibility and compassion is strong.

I hope the data can be retrieved, and I will post a beautiful photo of the bride and groom to share with everyone.

:)