Yesterday, I tried to make some simple apps which can download xml files from website, and put them on /mnt/sdcard/ . And fortunately, I succeeded in doing it. However, just a moment ago, I wondered if it works just because my phone is rooted. So I wonder if it works on un-rooted android phones?
And thank you, I found the answer :
It will work both rooted an un-rooted phone. It wont be any problem. 🙂
The answer is: No, you shouldn’t. Just make sure you add the Write permission in your msnifest (and I think you already did).