What is need for file sharing in iphones, when we download free mp3 songs in apps?

Why ppl keep saying file share with android is problem?
I don't think if we can download in itself why file sharing even required?

Hi this is your mis-undertanding of what is meant here.
the iphone uses MP3 files to store music on a device.
the only free bit is the MP3 conversion program.
why well it allows ordinary wav. Files to be shrunk on to a data format.
the sharing is to do with storing them in a cloud server somewhere on the planet. You store them then tell youir friends when and where they could down load your selection of music on to there I phones. So you see it is all a matter of how you view the whole issue.
an apps is the application like the MP3 application.

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