Best - Index-of-wallet-dat

This is a critical ethical and legal gray zone.

Ignorance is not a defense. Even if a server is misconfigured, that does not grant a license to take the files. Index-of-wallet-dat

Always keep multiple copies of your wallet.dat on offline USB drives. Encryption: Use a long, complex passphrase. This is a critical ethical and legal gray zone

: Avoid placing wallet files in any directory accessible by a web server or in public cloud storage like unencrypted Use Strong Encryption Index-of-wallet-dat

If the file is corrupted, you can try starting Bitcoin Core with the -salvagewallet flag to attempt to recover keys from the corrupt file.