I'm not trying to be facetious but what if they do ask and you say "sorry I don't have any cloud services" or more realistic "what are cloud services?" I'm no

I'm not trying to be facetious but what if they do ask and you say "sorry I don't have any cloud services" or more realistic "what are cloud services?" I'm no digital security expert and I haven't ever, and don't ever want to, travel to the US but if I was to travel there any devices I took would be blank. All data I needed would be in the cloud. How are they going to know?