The information in this article is out-of-date and is only being retained for reference purposes. For more up-to-date information, see here.
If you want to send funds from your MetaMask account back to Binance on the BSC network you will need to get BNB tokens to pay for gas.
You can purchase BNB tokens on Binance and send to your MetaMask address that is holding the tokens you want to send out
Remember that you need to have enough BNB to cover the gas fees to make transactions in the BSC chain.
Make sure to ask Binance for any special requirement before making a transaction (e.g. there is this one requirement you need to set the Gas Price to 10 Gwei when making a transaction in the Binance Smart Chain).
If you have any further questions regarding Binance Smart Chain in general, Binance Chain, or Binance Bridge please contact the Binance Support team directly.