Thanks for getting back. I did transfer the funds to Trezor but was confused to still see the private key in Electrum. Did transferring the funds create a new private key in Trezor that contains the funds?
Trezor will generate its own addresses (and consequently private-keys). They will never leave your hardware device, so that's why they are WAY more secure.
You sent the coins from your Electrum address to your Trezor address (different addresses).