Follow step below, if you have 3 NFTs so you need to do this 3 times. Some step may require you to jump from OpenSea.io to MetaMask App. Step in OpenSea.io Connect to OpenSea.io. In your collection , click the NFT you want to add to your wallet. The listing page for the NFT will open. Scroll down and click the option for Details. Click the blue hyperlinked value next to Contract Address. Itll open the contracts address on Etherscan. Towards the top-left corner of the page, youll find the option for Contract with a long string of letters and numbers next to it. This is the address of the smart contract that created the NFT. Click the Copy button next to it. Start Step 1 in MetaMask App. Copy the Token ID by taping on the value / number. Back to Step 8 in MetaMask App. Step in MetaMask App Go to the wallet in the app. If it isnt already open, tap the hamburger menu (three stacked lines) in the upper-left corner to go to your wallet. Then, tap Wallet from the menu. In the wallet, go to the NFT tab. You can view your NFTs here. To add an NFT, scroll down and tap the option for Import NFTs. The screen for importing an NFT will open. To import an NFT, you need the address of an NFT along with its ID. Paste the Address (from step 4 in OpenSea.io). Paste the ID number in the ID textbox. Finally, tap the Import button and your NFT will appear in your wallet.