Open Question: Connecting a device via USB, but nothing comes up on desktop manager?

I'm trying to access my media card on my Blackberry Storm 2. My OS is Windows 7 and I used the drivers that came on the disk and haven't found anything any more current. When I plug the USB in, I get a chime and my phone starts charging. Also, under device manager >> USB controllers, Blackberry Smartphone is listed. Under the properties, it says the device is working properly. But when I click on my computer, there's nothing there. How can I access the videos stored in my phone? It seems like everything is working as it's supposed to...this seems excessively complicated, I hope it's not just me making a stupid mistake.