I agree with the above. Worst case scenario they remove it from your bag, ask you what it is, and x-ray it again on its own. Take 15-20 minutes tops.
The real concern is them copying it. Which might sound like a very odd thing for them to do but I've read TONS of stories about people who have had their laptops, phones, and hard disks cloned.
Heck, I once got stopped at border crossing (US) and they decided to look though my digital camera's photos, as if it might contain evidence of ... something... Then starts asking me personal questions about my personal pictures ("Where was this taken?" "Who is this?" "What is going on here?").
PS - To beat the question it was at ATL from an EU Delta flight.