Offtopic-need some usb help

Ok, I got my hands on a 1gb USB memory stick, with a 3.5 audio output, kinda looks like a cheap old shuffle. Trouble is, it plays what is inside, but when I hook it up to the usb ports, it only charges, no sign of it as a usb stick anywhere on windows. I assume it was programmed somewhere to just do this, like a proprietary player or something, but is there any way to make this thing act as a regular usb stick?