What make and model camcorder are you using?

If it captures dv quality then the camcorder should have a dv output - funny looking little female plug - do a google for a dv out picture if you are undertain.

The "card" referenced would not be in your camera but in your computer. Some PCs come equipped with both usb2 and firewire inputs but if yours doesn't have a firewire input you can inexpensively buy (new around $50us dollars less used) card that would plug into an expansion slot on your PCs motherboard.

This is one of those simple plug-and-play type cards that you can pop into a slot in minutes.

USB just won't transfer dv quality video to your hard drive.

Video Studio does a great job of capture and capture control. Let us know info about your camcorder make and model and there are tons of smarter people than I that can help you.
Jim