I have been trying to use the binance smart chain to transfer my ETh to metamask but I am having issues. I currently have ETH on the Binance exchange and I have set up metamask to accept BSC. But when I go to binance bridge to transfer the ETH I get a message either saying insufficient ETh or The minimum amount is 0.38636067 ETH - but I have more than this on the binance exchange.

My metamask is set to binance smart chain testnet. What am I doing wrong here? Is Binance chain not connected to the binance exchange and cannot therefore see my ETH?

I really want to use BSC for this transfer as the gas fees for ETH are huge.