Well given the fact I've had SD cards go through washing machines, dryers and even had a DS game get run over by a fully loaded truck and survived.

I guess you could literally eat a MicroSD card and deliver it safely and intact in another country. This would even make it better than smuggling something the old way (swallowing a condom) because an air bubble has the chance of showing up in an x-ray. A MicroSD card would likely be completely invisible. Any copper would obviously show up, but the amount is likely to be indistinguishable from the iron we digest and the iron in our blood that is concentrated around our intestinal walls.