You literally don't have the data on you so you're not concealing anything. Just because you can download it later seems like flimsy reasoning. Otherwise, they

You literally don't have the data on you so you're not concealing anything. Just because you can download it later seems like flimsy reasoning. Otherwise, they could get your for "traveling with more than $X" because you have more than $X in a bank account somewhere that you could get via ATM.