Final Fantasies please help!

HELP! When i download the final fantasys(ds)(I only download from the US i dont download from any other places)and put them onto my cyclo ds exolution it says copiing file and the download will stay at the same % i need help. the only one that copieing succesfully was echoes of time

Try downloading it using a Download Manager like Free Download Manager.
It can help if there's a bad connection with your net.