fat16lib:
Always format SD cards using SD Formatter SD Memory Card Formatter for Windows/Mac | SD Association.NEVER format SD card with OS utilities!
Ok, ok, now what if you don't happen to be running Windoze or Max OS? And why should you trust that obscure company/organization, when they themselves declare:
www.sdcard.org/legal/index.html:
SD Card Association assumes no responsibility regarding the accuracy of the information that is provided by SD Card Association and use of such information is at the recipient's own risk. SD Card Association provides no assurances that any reported problems may be resolved with the use of any information that SD Card Association provides.
while, on the other hand, they charge $2k to become a member?