Always format SD cards using SD Formatter SD Memory Card Formatter for Windows/Mac | SD Association . NEVER format SD card with OS utilities! Here are some examples that show what can happen. First is an extreme case for determining free space on an SD. This type performance hit will also be true f…

Don't Format SD cards with OS utilities!

liuzengqiang March 24, 2014, 2:11pm 2

Karma Karma!
You saved my day!

Arduino uno SD Card storage problems