file creation date and time in sd card ?

Projects General Guidance
2

Install the SdFat library - there is an example called Timestamp.ino describing in detail how to do it..

// after your rtc is set up and working you code just needs:

void dateTime(uint16_t* date, uint16_t* time) {
  DateTime now = rtc.now();

  // return date using FAT_DATE macro to format fields
  *date = FAT_DATE(now.year(), now.month(), now.day());

  // return time using FAT_TIME macro to format fields
  *time = FAT_TIME(now.hour(), now.minute(), now.second());
}

//put that outside of any functions, before your 'setup'

//Then inside your 'loop' or 'setup'

void loop(void)
{

  //Other code that does stuff

  //put this next line *Right Before* any file open line:
  SdFile::dateTimeCallback(dateTime);
  dataFile = SD.open(datafilename, FILE_WRITE);

  //other code that does stuff

}
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