Extracting and sorting AVCHD Clips

I just got a Panasonic Lumix GH3 camera. I took shots for several different projects all on the same SD card. I want to separate the clips into the corresponding project folders on my computer so that I can label the clips and import and edit them later in Premiere. When I insert the SD card, I click on private and the AVCHD file. I dragged and dropped the whole file onto myu desktop and then opened it. I then tried to drag and drop the individual files to the folders, but it doesn't work. I don't want to import the whole file into Premiere because the clips are from several different projects. How can I extract the clips out to sort them before working with them in Premiere?