Try this:
Don’t bother copying the files on your hard drive. Just hook up your camera and wait til your computer recognizes it by displaying an icon on your desktop.
In FCP go file, then log and trans. When the window opens, you should see the video files on your camera. Highlight the ones you want (log) and then transfer by dragging the files to the bottom window (“drag media here”).
There are millions of ways to do this, but this works for me.
By the way, I am considering the Panasonic 150 for my next camera.