1. Transfer files, you need to install the drivers via kies, then just plug. Do not run kies after that, because you only need drivers. S2 will be like a thumbdrive.

2. The phone cannot consume the battery, it has no mouth or digestive system. But in terms of depleting the battery's charge, I would say it really depends on your usage. For me 1 day I can get by probably until 50%.

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Added on March 23, 2012, 3:17 pm

You can use any file explorer and check your DCIM folder for camera pictures.

If its empty, probably means its gone.

You turn off so many things, its as good as a dumbphone with a big screen :s

But you can use a totally black wallpaper. Maybe turn off the phone totally if not in use if you're that particular about power. lol