When you save a GenCG document, all imported files such as images and animations are not saved with the document; only the file location is saved. If you transfer GenCG files from a computer to your Compix system, GenCG will ask for the location which all imported objects are located.
Instead of saving the GenCG file, you will want to export the content. Go to [File] > [Export GEF] to export (GEF stands for GenCG Embedded File). This will embed all images and animations giving you the exported file to move around.
To import the GEF file, go to [File] > [Imported GEF]. GenCG will ask you where to extract the file.