I can transfer the Solana from one account to another account using phantom wallet using this code
const transferTransaction = new Transaction()
.add(SystemProgram.transfer({
fromPubkey: alice.publicKey,
toPubkey: feePayer.publicKey,
lamports: lamportsToSend
}))
const network = "https://api.devnet.solana.com";
const connection = new Connection(network);
transferTransaction.recentBlockhash = (await connection.getRecentBlockhash()).blockhash;
transferTransaction.feePayer = alice.publicKey;
const { signature } = await window.solana.signAndSendTransaction(transferTransaction);
await connection.confirmTransaction(signature);
console.log(signature);
but I am wondering how can I transfer the NFT if I have the nft minted address?
To transfer an NFT, you first need to find out the address of the NFT's mint and the owner's address. Then instead of calling SystemProgram.transfer, you'll use Token.createTransferCheckedInstruction.
There's a great example at the Solana Cookbook for transferring SPL tokens: https://solanacookbook.com/references/token.html#transfer-token