Fake micro SD cards

The Market is flooded with fake microSD cards, especially on Ebay, these card mount OK, report correct capacity written on the package, and never report an error when capacity of the original card before modification has passed,  These cards even format OK to the fake capacity.  Here is an example,  a card  physically is 4GB but its label and FAT file has changed to say 64GB.  You never know it is fake except to find out after 4GB in this case is reached and files start not to exit even when the FAT file tells you your file is in the memory. H2testw software  is very slow, but you can  test your card by writing a lot of large files like videos to the card and find out is it really is what claims to be.  Also note older devices don’t read exfat formated cards, so read the specs of your device may be SD card is not the problem. Buy  SD cards from large chains or authorized dealers, consider  the rest fake. Use your PC to Test the card immediately after purchase because you might pass the window to return it.