To export your private keys:
- Open your wallet on Galleon by selecting your existing wallet file and entering your passphrase.
- Click on the key icon next to your manager address.
- Enter your wallet password again to view your private key. It is labeled “secret key” on Galleon.
- Note it down and keep it in a secure place.
Remember, it’s never safe to share your private key with anyone.
You can consult this tutorial for a video walkthrough: How to backup an account on the Tezos blockchain - YouTube