Today, I dragged a folder with a few subfolders into iPhoto. It froze relatively soon, but the loading animation continued to spin. The "Stop Import" button did nothing on any of the choices, so I force quit iPhoto. When I went to open it back up it said something like "The iPhoto Library is locked, on a locked disk, or you do not have permission to make changes to it." I couldn't figure out what to do, so I made a new library and eventually ended up just dragging all the files, then subfolders into the library. Does anyone know why this happened? (The photos were on a NFTS format and dragged to my computer then imported to iPhoto.)