Quote from: sumguy2017 on June 21, 2021, 11:28:33 PM

But that would only work if the receiver allows him sending two different transactions. If not, I agree that the best option is to move everything from Coinbase to Electrum and then send whatever he needs from Electrum.

You can send as many transactions from your Coinbase wallet as you want, for example if you have 1BTC and want to send 0.1BTC you send that in one transaction and will be left with 0.9BTC which you can send in another transaction to your Electrum wallet.

The problem is sending to both destinations in one transaction which requires Coinbase to allow you to use "send to many" option if it has (I don't use Coinbase and couldn't find information on the internet). In such option you would set 2 receiving addresses in your transaction one for 0.1BTC and the other for 0.9BTC and only send 1 transaction while paying 2 recipients. Those receiving the payment do not care that you also made another payment since your transaction almost always contains a change and that change might as well go to your Electrum instead of back to Coinbase.