iOS file manager

hello all,

I'm taichong from Philippines and I'm glad to here from you guys the answer to my question and here it is,
I have an app which is a free audio lesson on it and it takes 4 gigs in size, I want to copy that audio inside that app and save it to my computer or elsewhere,
my question is, is there an file manager on iPhone which I can browse my iPhone like the file explorer on PC? from that, I think, I can copy the content of that audio lesson then save it to my PC?

any suggestion are appreciated, thanks!

Forum: 

Dropbox

Probably the easiest way would be to install dropbox on your phone and computer, then share the file on your phone with the dropbox app. When you've done that, it'll be in the dropbox folder on your computer. If you don't already have a dropbox account, you can get one for free, although free acounts are only 2 GB so if you don't want to pay, you'll have to copy half of your audio files into dropbox, move them elsewhere on your computer, then copy the other half. (I'm assuming here that you've got 4 GB worth of audio files, not a single 4 GB file).