100 metric tons is nothing really when it comes to trucking, logging trucks in Sweden are commonly hurling through down dirt roads at 70-80km/h with 70 ton loads (mostly limited to that because that's the maximum allowed weight without oversize escorts currently), the Finns are experimenting with 100 ton loads for logging purposes (for environmental reasons).
That's not even mentioning Australian road trains that seem to commonly pull around 150 tons with some being up to 200 tons (The load would be slightly spread out to more containers but still one truck-load).
Still, 400 million SD-cards is still a silly experiment.
MisterTea
The weight limits are for public roads. Private logging roads can run whatever they want and Canada had(have?) some impressive rigs routinely hauling 100+ tons. Just do an image search for Hayes/Pacific logging truck.
That's not even mentioning Australian road trains that seem to commonly pull around 150 tons with some being up to 200 tons (The load would be slightly spread out to more containers but still one truck-load).
Still, 400 million SD-cards is still a silly experiment.