@NonNull
    public static File getTrackfilesDir() {
        final File dir = new File(getInternalCgeoDirectory(), TRACKFILE_CACHE_DIR_NAME);
        dir.mkdirs();
        return dir;
    }
Get the internal directory to store offline log images (c:geo-copies) while they are not
sent to the server

@return the offline log images directory
main/src/main/java/cgeo/geocaching/storage/LocalStorage.java