I saw this response to a customer's complaint about a microSD card DOA failure, and thought it was a fascinating insight into one company employee's mindset.
We sincerely apologize for the inconvenience. It is strange the microSD card is not working properly. Please send it in for RMA and a replacement should work flawlessly. Unfortunately, due to the nature of flash, random defects can happen. For that reason, all ******* memory cards are backed by a lifetime warranty. At any time a card does not work to specification, we can have it replaced immediately.
Based on the above, shouldn't we conclude that the logical conclusion is that ALL products should have a "lifetime warranty"?
ALL products of any technology you can name are by nature subject to "random defects".
I think, however, that I'll take this as an accidental admission that dense memory devices can be too easily damaged. Whether by ESD, temperature, accelerated particle/energy bombardment (e.g. "security" scans), mechanical stress, and so on.
I've seen LOTS of reviews from people complaining about 32GB and above SD cards failing DOA and after just a few months of use. Weren't limited to just one or two companies, either.
Probably a good idea to keep spares on hand, especially while travelling...possibly wrapped in foil. And of course follow good ESD handling protocols while they aren't installed in a device.