I use lots of SD cards from 2gB upwards (but not micro SD ).
They are always kept either in the appliance or in a protective case.
In 2 years I haven't had a failure.
They have survived airport security, 4wd vehicle use, and plenty of other rough and tumble.
I make sure that they are not subjected to extreme heat although the ones in the GPS on the dash get pretty hot in summer.
I also make sure that their terminals are kept clean and they are not subject to any bending or really strong magnetic fields.
They are rugged little blighters.


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