Dat file is located in the bitcoin data directory and may be encrypted with a password. It is intended that a wallet file be used on only one installation of bitcoin at a time. Attempting to clone a wallet file for use on multiple computers will result in weird behavior 1.
Dat file was synchronized in the bitcoin-qt application and verified. The file will be deleted from list when someone hits the jackpot and takes the bitcoins from the wallet.
Dat this method is used by bitcoin core (and few others) and comprises of backing up a wallet. Its a file that holds keys to spend outputs, addresses, transaction information, and other metadata such as contacts.
Py and electrum, which allowed me to read the wallet and sweep the coins to a new electrum wallet.
Most wallets have the ability to send and receive with legacy bitcoin addresses. Legacy addresses start with 1 or 3 (as opposed to starting with bc1). Without legacy address support, you may not be able to receive bitcoin from older wallets or exchanges.
Install a new bitcoin wallet (like bitpay) open bitcoin core open the debug console inside bitcoin core gather some information create a raw transaction sign the raw transaction broadcast the raw transaction steps install a new wallet of choice, we recommend bitpay wallet.
If you currently have no bitcoins in your wallet, you can just delete that file and replace it with your backup. If you have some bitcoins in this wallet as well, backup that wallet file as well, or send all the coins to an address from your backed up wallet. Dat file in place, you should run bitcoin-qt with the -rescan option.
In the console you can type help return for all commands 4a. Enter your password like this walletpassphrase passphrase timeout in seconds 4b. Dumprivkey (address description, like default) will dump your private key.