Caught tail end of Fake Britain the other evening.
Interesting article on fake SD cards - in this case MicroSD card marked as 64gb turned out to be rubbish 16gb that had been friggled to report as 64gb
Result - corrupted files.
With the increasing importance of dash-cams which use MicroSD it may be worth considering whether that cheap ebay bargain card in an authentic looking SanDisk pack is all it claims to be.