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  • and Ive tried formatting with SD formatter , no change .Im not using long wires since this is a closed circuit .and upto my knowledge arduino supports upto 8gb fine and good . and ive triple checked the connections , its good .Is there something with the memory ? Please do let me know If there is something Commented Mar 17, 2017 at 12:35
  • Could you try with another SD memory card ? Is something else connected to the MISO ? When the module has a voltage regulator, and a 3.3V and 5V pin, then you could try to power it with 5V to the 5V pin and leave the 3.3V pin of the module open. The SD card module could be broken. Commented Mar 17, 2017 at 15:32
  • @ Jot Yeah ive tried it with 16gb memory card its working ,I dont know why its not working with 8 gb memory card Commented Mar 20, 2017 at 4:57
  • I'm glad it is working. Some memory cards are not compatible with the Arduino SD library, it happens. Commented Mar 21, 2017 at 6:38