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USB Mass Storage Stm32F4 Discovery is not saving data

Question asked by quoc.anh on Feb 18, 2017
Latest reply on Feb 18, 2017 by Clive One

I am doing a usb mass storage with stm32 f4 discovery with micro sd card to copy files from computer to micro sd card I was read at this link : but my micro sd card is not saving files after I restart kit or unplug usb jack. sorry for my bad English!!! help me please!!!