Is there a way to view my wallet private keys?
If you don't show them, then no, no one sees your keys. Beware of resources that ask you to enter your private key. Or they should be in the list of trusted ones from the developer. Use BGL Core.
I'm using BGL Core, I was asking if there is a way I can view my passphrase to write it down again, in case I lost my backup. Thank you.
Of course, this can be done very simply. This has already been written here. Both methods work, you can choose any one.
How to export a wallet such private key or anything to save or moving my wallet to another device? i have a habit to reinstall my windows frequently.
If you use a Windows wallet, there are 2 ways.
1. Copy your wallet.dat file (do this when the client has finished working). After changing the system/computer, overwrite the wallet.dat file with your own, which you copied and saved.
2. Extract all private keys. Do this for each of your addresses using the Client Console.
dumpprivkey your_address
After changing the system/computer import your private saved key.
importprivkey your_privkey
All the rules that are valid for the BTC client are played here.
You can dump private key of one address or dump all the wallet. Use the code in your Console, and command line.
dumpprivkey "address"
dumpwallet "filename"
You can copy your wallet file in the directory. Open your wallet, choose the tab Windows, choose Information. You will get the directory in which your wallet file is stored.
Copy the link in Datadir line that is something like. Copy and paste the link into the Search box of your OS and open the folder.
You will see the sub-folder wallets
Copy and paste the wallet file as your backup. Use it on your other computers.
C:\Users\xxxxxx\AppData\Roaming\BGL