When Databases are created, a folder named IMAGES is always created in the same folder than the Database file (although users can select other placement or name for that folder). The IMAGES folder is where images acquired from  video sources and audio recordings are stored. When creating a Database users must select if they want to copy all files added to the Database inside the IMAGES folder or if they prefer to kept such files as external files.

The Database file itself (with .bdata file extension) only stores the images Thumbnails, not the real pictures.