It seems Coinbase is having 'sending delays' so you might not be able to move your coins.  I don't have a trezor yet so I got Bread wallet on my Iphone.  I'm still new to this and everyone's saying move your coins from the exchanges.  But It looks like that time has passed or will be delayed.  BTW, when you do make a transfer, does it automatically give you your private keys or does the exchange still have them?