hi guys ..

i got some problems with the internal memory , i insert an external memory for some times then i plug it out , n it says for me from that time :
" unable to receive or send new massages.
device storage full .
remove data to free memory. "

i don't know what is the problem n how i can fix this thing
if any1 know what is going with the device please tell me what is't n how i can fix it

thanx in advance