The day after BCC comes into existence, Trezor users will be able to go to the Trezor wallet website, connect their Trezor, and see a balance in BTC and a separate (identical) balance in BCC.
Users will then be able to send (via the trezor wallet website) the BCC balance in a transaction to an exchange, while leaving the BTC balance on the Trezor
RE: The Doubling: A Helpful Guide for BTC Holders to Get ALL the Coins Coming to Them Next Week