Bitcoin Core Wallet.dat ((hot)) Official

That power comes with responsibility. Treat wallet.dat like a stack of physical gold bars. Encrypt it. Back it up. Keep it offline when possible. And never, ever lose your passphrase.

Always shut down Bitcoin Core gracefully via File > Exit (not the window X button). Consider running Core on a UPS (Uninterruptible Power Supply) to prevent sudden power loss. Bitcoin Core Wallet.dat

Always keep 2-3 backups. If one file corrupts, you have others. That power comes with responsibility