To withdraw USDC to an external wallet, tap the three dots next to your Cash balance, select Withdraw, then choose Crypto wallet. Enter the amount and tap Continue.
Select the network the receiving wallet supports from the dropdown at the top. fomo supports withdrawals on Solana, Base, BNB Chain, Monad, Ethereum, and Robinhood Chain. On the first five networks you withdraw USDC. On Robinhood Chain you withdraw USDG. Paste the deposit address from your receiving wallet for that same network and asset, then tap Review and confirm.
Make sure the network you select in fomo matches the network the receiving wallet expects. Sending to the wrong network or to an address you do not control can result in permanent loss of funds.