Pen drive is recognizing as a USB Internet Dongle which connects to the PC. How do the Pen drive configure well in Ubuntu 12.04?

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http://askubuntu.com – Every time I connect my Pen drive it recognizes as more like a Dongle. The reason that I'm telling that if I connect it to the PC when I'm on the INTERNET, it will automatically copy all the files which are in the Dongle. So, I can't recognize which one is the Pen drive when I want to safely remove the device. I'm not sure whether it is the Pen drive or the Dongle..? Can anyone give me a good advice how to solve this problem? (HowTos)