The "insufficient storage available" error was in all the time and i kept adding music. after a while it froze and i turned it off but when i try to turn it back on it doesn't get past the loading screen.
i do not know what happened but it magically worked. i removed the battery for 30 min and connected the phone to my laptop and downloaded Samsung kies and kept turning it on and off on and of tell it finally worked. when i checked how many storage is available it was 150 MB. Thank you all