I can't move or copy any files my device to sd card

[Abirokey]

I can't move or copy any files my device to sd card.. plz anybody help me..my device is SM-J510F

 

[jasonandrews25788]

does it have enough space?

 

[Rukbat]

Internal sdcard, or external extSdCard?

If the external card, have you tried it on a PC? (The card could be defective.)