Bitcoin Core Wallet.dat [portable] Direct

If you: lose wallet.dat + have no backup + forget passphrase →

Beyond encryption security, other research highlights the forensic and technical nature of these files: Digital Forensics : A study titled Bitcoin Core Wallet.dat

He tried variations. He swapped the capital letters. He removed the exclamation point. He added his childhood dog’s name. With every failed attempt, the weight of the digital gold felt heavier, a fortune locked behind a door he might never open. He leaned back, the silence of the basement suddenly deafening. He wasn't a millionaire yet. He was just a man with a 72-kilobyte ghost. He closed his eyes, trying to travel back to 2011, trying to remember the mind of the boy who thought he was just playing a game. If you: lose wallet

The blockchain data ( blocks/ and chainstate/ folders) can be deleted and re-downloaded. The wallet.dat file is irreplaceable . He added his childhood dog’s name

If you restore an old wallet.dat into a new node installation, the software will need to "rescan" the blockchain. It must check every block in history to see if any transactions were sent to the addresses in your wallet file. This can take hours, but it is a necessary part of syncing your history.