how can i save audio in iphone from server

Question

Hi all,

i m developing a application in which content size is very high,problem is how i decrease the size of our application.

i have one idea for that my application is song application. when user download the application after that he wants to here song then click on particular song tab then song is downloaded from our server one time and save in user application document folder.if once downloaded particular song then user never required to download again and again.

is it possible?

Please tell me how i implement this in my application.

Thanks,

Pradeep