But the numbers are not LOW if you think about it.  3 percent is a lot.  Every time you cross borders, your chance increases to fall for a secondary inspection.  In the numbers NotFuzzyWarm presented, around 17 MILLION people went through second screening only in the last year.  The number is in fact huge, even if it is almost nothing compared to TOTAL number of travelers.

I know people who traveled to the United States and went through secondary screening.  They had their devices checked too.  I also often heard the worst thing you can do is bring USB sticks and hard drives.  It sounds insane that these are among the worst things you can travel with, but it is what it is.  The best thing to do is simply travel with a dumb phone or a clean smart phone with only essential applications installed on it.  If they ever check you, you at least have nothing to worry about.