Support usb mass transfer mode? how to?

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http://androidforums.com – ok so I went ahead and connected my Samsung galaxy s3 to my computer via usb to transfer pictures and I was uber-disappointed to see that my computer did not detect the phone as a usb mass storage device. so I've searched the web and had the misfortune to discover that apparently it's not possible to connect the galaxy usb mass storage device like a usb stick which most people have these days and which most if not all phones are capable of. so how do you enable the usb mass storage transfer mode on the galaxy s3?????? cheers! (General)