P2 Store Question

Ok I have P2 store and have been dumping cards to the store unit.How do I tell which cards are the new folders on the P2 store when each folder is labeled "NO NAME" ? It would be nice if a date or incremental # was there so I could ID each folder. I do not want to keep transfering the same card(s) data that I already transferd, but I have no way on knowing which one went over. Right now I find a video file name and use a search to see if that file has been transfered, and by the process of elimation, I find the new "NO NAME" folder(s) to transfer..any other ideas? I still am keeping the data on the drive as another back-up.